本文目录
M14步枪为什么说是款失败之作
二战时期，德军率先研制装备发射7.92X33mm短步枪弹的StG-44突击步枪，具备划时代的意义，既保留了400米内大威力步枪弹的杀伤效果，同时又拥有了冲锋枪200米内近战的凶猛火力，是一把集手动步枪和冲锋枪优点于一体的突击步枪，极大地影响了战后自动步枪的研制和装备。
德军显然发现了毛瑟98K步枪发射7.92×57mm步枪弹，威力过剩的问题，800米的有效射程，对于步兵来说，如果不装上观瞄器材，对于战场上有移动目标，不仅瞄不准，而且也打不准，步兵的交战距离，一把心急的也就400米开始射击了。
战时将毛瑟98K装上4倍光学瞄准镜，就成了一把具备狙击功能的狙击枪，尽管未开发专职的狙击弹，发射的仍然是7.92×57mm毛瑟步枪弹，具备杀伤800米开外目标的能力。
毛瑟98K型5发弹仓供弹步枪，由于射击时后坐力较高，射手都不易掌控发射，认识到7.92X57mm毛瑟步枪弹威力过剩以后，德国军工率先在全球研发成功7.92X33mm步枪短弹，有了弹以后，就研发成功了StG-44突击步枪。-thinkvisionm14
StG-44突击步枪，采用30发弹匣供弹，能实施单连发射击，有效射程400米，成了全球率先真正投入实战的第一把发射中间威力步枪弹自动步枪，在苏德战场上发挥了巨大作用，常能压制射程较近但火力非常凶猛的波波沙冲锋枪。-thinkvisionm14
AK-47自动步枪，卡拉什尼科夫研发设计，发射7.62X39mm中间威力步枪弹，显然受到了战时德军StG-44突击步枪的影响，30发供弹具的AK-47自动步枪，被大量投入越战，成了20发弹匣供弹的M-14、M-16自动步枪最强大的战场对手，AK-47以其凶猛的火力，在丛林战中，常能压制住火力比其弱的M-14、M-16自动步枪。-thinkvisionm14
M-14，装备二战以后的美陆军步兵，发射7.62X51mm大威力步枪弹，能实施单连发射击，常让身材矮小的南越士兵难以掌控射击，美军拉出了参与过二战的库存的M-1式卡宾枪、M-1A1冲锋枪，成了军援南越军队的制式装备。-thinkvisionm14
在装上1只20发弹匣以后，M-14自动步枪枪重10斤，显得非常沉重；此外，全枪长达1.12米，枪重和枪长，堪比一挺轻机枪，在丛林作战中，不免磕磕碰碰，使用非常不方便；另外，6只20发弹匣120发的携弹数量也不高。-thinkvisionm14
关键是M-14自动步枪，其火力的输出，要远逊于对手装备的AK-47自动步枪，以及仿AK-47的56式冲锋枪，因此，参与越战的美国大兵，其实并不看好M-14自动步枪。
最终，M-14自动步枪，就被重量更轻，部分采用铝合金的M-16自动步枪所取代，装上1只20发实弹匣（火力仍逊于30发供弹具的AK-47），M-16全枪重量仅为7斤，枪身也要短许多，全枪仅长0.98米。-thinkvisionm14
相对于既长又笨重的M-14，M-16称得上既短又轻，而且美军跳过了发射中间威力步枪弹的自动步枪，直接开发了5.56X45mm步枪弹，开创了全球军队率先装备小口径自动步枪的先河。
就其整体性能而言，战后的美军，并未开发装备发射中间威力步枪弹的自动步枪，而是在二战名枪M-1加兰德半自动步枪的基础上，改进出了M-14自动步枪，保留了M-1加兰德半自动步枪射程远、射击精度高的优点，同时用20发弹匣，取代了M-1加兰德半自动步枪8发钢制漏夹弹仓供弹。-thinkvisionm14
M-14，是把性能中规中矩的自动步枪，硬要将其称为研发失败，其实，也是站不住脚的，但在战后是以装备发射中间威力步枪弹自动步枪为主的背景下，美军仍然开发研制装备大威力步枪弹的自动步枪，似乎有些后知后觉了。-thinkvisionm14
受越战丛林战中M-14自动步枪的糟糕表现，美军研制装备发射小口径步枪弹的M-16自动步枪，是全球陆军第一个吃“螃蟹”者，堪称是先知先觉的行为。
阿富汗战争，面对当地抵抗组织老旧的李·恩菲尔德步枪，在800米开外距离上的打击，装备M-16自动步枪的美国大兵就毫无还手之力，毕竟此枪的有效射程只有400米。
于是，美国大兵拉出了库存的参与过越战的M-14步枪，装上1具光学瞄准镜，一只两脚架，就成了一把有效射程800米，20发弹匣供弹的狙击枪，被重新命名为M-21狙击步枪，有效抗击了当地抵抗组织用老旧步枪，对美军小分队参与下乡围剿时的袭扰。-thinkvisionm14
有2020-2021年七年级上学期英语期末考试题部编含答案吗
2020-2021年七年级上学期英语期末考试题（部编人教版含答案）
考试时间：100分钟，试卷满分：100分I．听力（共10 分，每小题1分）A．听句子，选择与所听内容相符的图片（每个句子读两遍，每小题1分） 1. 2. 3. 4. 5. B.听句子，选择恰当的答浯（每个句子读两遍，每小题1分）( )6.A．It’s black． B. Its 10 dollars. C. It’s big.( )7.A. I have a tennis. B. Its mine. C. No, I dont.( )8.A. That sounds good. B. I have a volleyball. C. Yes, I do.( )9.A.Im sorry. B. Excuse me. C. You are welcome.( )10.A.Its my soccer. B. It’s under the chair. C. Yes, It is．Ⅱ．单项选择（共20分，每小题1分）从各题的四个选项中选出一个最佳答案．( )11.--- Whats your brothers favorite____?--- English. A. subject B. food C. color D. sport( )12. _ is the eighth month of a year.A. August B. December C. October D. January( )13. --- do you like math?--- Because its interesting . A. What B. Why C. When D. Where( )14.--- Whats your mothers favorite color? --- favorite color is red.A. She B. Her C. His D. Hers( )15.--- Helen, do you like math? --- No, I dont. It’s . A. interesting B. exciting C. difficult D. good( )16.--- The socks are very cheap. --- I’ll them. A. give B. bring C. like D. take ( )17.The students come to see their teachers September 10th. A. at B. in C. on D. of( )18.How much these trousers? A. is B. have C. are D. do ( )19.--- What do you eat for breakfast?--- Only Egg.A．the B. a C. an D. /( )20.--- Are you now? --- Sorry, I am very busy. A. happy B. free C. fat D. fine( )21.--- Do you _ _ doing sports?--- Yes, I do. I like it very much. A. ask B. 1ike C. help D. go( )22. _ _ is after Tuesday. A. Saturday B. Wednesday C. Thursday D. Friday( )23.--- _ _ you like hamburgers? --- No, I don’t.A. Are B. Do C. Is D. Does( )24.I want _ _ a sweater this afternoon. A. to buy B. buy C. buys D. take( )25. I dont want long trousers. I need _ _ trousers. A. red B. black C. short D. big( )26.--- Do you have School Day at your school? --- _ _ . It’s on November 23rd. A. Yes, We do B. No, we dont C. Yes, it is D. No, it isn’t( )27. My father _ _ have a soccer ball. A. dont B. doesnt C. isnt D. aren’t( )28.The shirt is very good, _ _ I dont like it. A. and B. but C. or D. so ( )29.We go to school _ _ Monday _ _ Friday. A. from; to B. from; from C. to; from D. to; ro( )30. --- We have a school trip this week. --- _ __ _. A. Have a good time B. Thank you C. Im very happy D. Thats OKⅢ．情景交际（共5分，每空1分）（请将答案写在题后指定位置）从下面的方框内所给句子中选择恰当的句子完成下面的对话.（有两项多余）A: Hi! I’m Mark. (31) _ _B: My name is Jack. Nice to meet you.A: Nice to meet you, too.(32) _ _B: I’m twelve. What about you?A: Im eleven. (33) _ _ .B; Next Tuesday is my birthday.A: Wow. My birthday is next Tuesday, too.B: Well, how about having a birthday party together一起） at my home next Tuesday?A: (34) _ _ . Thank you!B: (35) _ _ .A. How old are you? B. What color is it?C. Whats your name? D. Youre welcome.E. When is your birthday? F. That sounds great.G. Who are they?31. _ _ 32. _ _ 33. _ _ 34. _ _ 35. _ _ -thinkvisionm14
Ⅳ.完型填空（共5分，每小题1分）根据短文内容，从A.B.C.D四个选项中选择一个最佳答案. This is _36_ English boy,_37_ name is John. He eats lots of healthy _38_.Fo r breakfast, he has three eggs. four hamburgers and sala d. He has some chicken and many vegetables _39_ lunch. For dinner he 40 tomatoes and rice. He doesnt want to be fat.( ) 36.A．a B．an C．the D./( ) 37.A. Her B. Your C. His D. My( ) 38.A. box B. food C. pen D. skirt( ) 39.A. to B. in C. of D. for( ) 40.A. likes B. plays C. sells D. knowsV．阅读理解（共20分，每小题1分）Passage l以下是一份桑迪(Sandy)的课程表,请根据课程表内容，完成下列各题. Monday Tuesday Wednesday Thursday Friday8:30-9:1O Chinese English Chinese Math Chinese9:20-10:00 art history Math English science10:10-10:50 Math Music English P.E. history11:00-11:40 Geography Chinese Geography Chine se math11:40-14:00 Lunchtime(午餐时间)14:00-14:40 Science P.E. Art Geography English14:50-15:30 Class party Free Science Music free -thinkvisionm14
( )41.The second lesson on Tuesday is . A. geography B. history C. English D. music( )42.Sandy has English class(es)in a week (周). A. two B. three C. four D. five ( )43.The lunchtime is . A. 11:00-11:40 B. 14:00-14:40 C.11:40-14:00 D.10:10-10:50( )44.Sandy has on Thursday afternoon. A. geography and music B. science and English C. P.E. and Chinese D. art and science( )45.Sandys favorite day is because she can have class party. A. Friday B. Monday C. Wednesday D. ThursdayPassage 2 Name: Nick BrownBirthday: May 6thAge(年龄):13Favorite sport: basketball Name: Alice GreenBirthday: October 9thAge(年龄):14Favorite sport: tennis Name: David HandBirthday: July 6thAge(年龄):14Favorite sport: basketball Name: Zhang XiaBirthday: May 16thAge(年龄):15Favorite sport: ping-pong-thinkvisionm14
( )46.Nick Brown is years old(岁). A. 15 B. 14 C. 13 D. 12( )47.When is Alices birthday? A. May 6th. B. May 16th. C. July 26th. D. October 9th.( )48.What is Davids favorite sport? A. basketball. B. tennis. C. baseba ll. D. ping-pong.( )49.Zhang Xias birthday is in A. July B. May C. October D. I dont know( )50.We know Alice and David have the same(相同的) . A. Age（年龄） B. Birthday C. Favorite sport D. NamePassage 3Hi, come and buy Clothes at Zig Zags Shop. The store is for boys and girls. We have black and blue hats for ＄15. The blue sweater is ＄33 and the red sweater is ＄30. The yellow shorts are also ＄30 and the green shorts are on sale for ＄25!( )51. Zig Zags shop sells . A. books B. clothes C. b alls D. food( )52. The store is for . A. fathers B. mothers C. teachers D. boys and girls( )53. The is ＄33.A. blue hat B. blue sweater C. red hat D. red sweater( )54. The green shorts are on sale for . A. ＄3 B. ＄30 C. ＄25 D. ＄15( )55.The and the are in the same price(相同的价钱).A. red sweater, yellow shorts B. red sweater, blue sweaterC. yellow shorts, green shorts D. blue sweater, yellow shortsPassage 4Hello! My name is Emma. We usually have four lessons in the morning. My favorite day is Friday. Do you know why? We haw a music lesson on Friday morning. Music is my favorite subject. On Friday afternoon We only have two classes, P.E. and oral English. P.E. teacher is my favorite teacher because her lessons are very interesting. I like the nice weekend. ( )56.Emma usually h as lessons in the morning. A. two B. three C. four D. seven( )57.Emma’s favorite day is . A. Sunday B. Saturday C. Friday D. Thursday( )58.Emmas favorite subject is . A. English B. math C. Chinese D. music( )59.They only have classes on Friday afternoon. A. two B. five C. Six D. three( )60.Emmas favorite teacher is her teacher. A. music B. P.E. C. oral English D. ChineseⅥ，补全对话（共5分，每小题1分）请将答案写在下方表格内在下面购物对话的空白处填入适当的话语（话语可能是句子、短语或单词）A：___61___？B:Yes. please. I need a jacket.A： 62 this black one?B: Sorry.1 dont like black jacket.A: Look at this red one. It looks very nice.B: OK. I like red, too. __63__ is it?A: Four dollars.B：OK. III take it.A:___64___ you are.B：Thank you.B： 65 .61 62 6364 65 -thinkvisionm14
Ⅶ．句型转换(5分)66.I have a soccer ball.(交一般疑问句) you have a soccer ball?67. Does Anna like eggs?（否定回答） No, she .68. His birthday is on November 8th（划线提问） is his birthday?69.Your football is under the bed.(划线提问 ) is your football?70.Mr. Hu is my P.E. teacher.(划线提问) is your P.E. teacher?66 67 6869 70 -thinkvisionm14
Ⅷ.用所给词的适当形式填空（共5分，从所给词中选择答案并写在题后表格内）71.Those (tomato tomatoes) are red. You can eat one.72.Tina (have has)a great model plane.73.I got(得到) a nice book on my (nine ninth) birthday.74.Some rice (is are) in the bag.75.I have some books. I love (they them)very much.71 72 7374 75 -thinkvisionm14
Ⅸ．根据所给中文完成句子翻译（共5分）请将答案 写在下方表格内76. (课后), we like playing basketball.77. Lets (考虑)the food.78. I want to buy (一双)shoes.79. （怎么样）having breakfast at home?80. We （看电视）everyday.76 77 7879 80 -thinkvisionm14
Ⅹ．根据短文内容按要求完成任务.（共10分，每小题1分）Passage 5 阅读下面短文，简略回答所提出的问题.Dear friends, Today is a great day, July 10th is my birthday. Im twenty years old. Do you want to come to my birthday party? At 5:00 P.M. July 10th, in Star Food Store. We play fun games and eat fruit and a big birthday cake. Please call me at 45632219.Yours, Ann. 81. How old is Ann? 82. When is Anns birthday? 83. Is Anns telephone number 45632219? 84. Where does Ann have her birthday party? 85. What do they eat on the party?81 82 8384 85 -thinkvisionm14
Passage 6 阅读下面短文，根据短文内容完成信息.Im John. Its Monday, October 28. Im really busy today! At 8:00,1 have Chinese. I dont like Chinese. Its boring. Then at 9:00, I have math. I like math very much because its interesting. Next, at 10:00, I have English. English is my favorite subject. I eat lunch at 12:15. After lunch, I have science. It’s fun. Then I have P.E. I tike it. Its exciting. We can play soccer. After P.E., we have history. It finishes about 5:00 p.m..86. John doesn’t like Chinese, because it’s .87. John like very much because it’s interesting.88. John’s favorite subject is .89. After P.E., they have .90. John’s classes finish at about .-thinkvisionm14
86 87 8889 90
XI.书面表达（共10分） 亲爱的同学们，快乐的初中生活不知不觉中已经过去半年了，大家在英语课上表现的都非常出色，假设你是Wang Hao，请用英文介绍一下你自己吧!内容提示：1．介绍你的姓名、年龄、电话号码、生日、喜欢的食物. 2你喜欢的学科和理由、放学后喜欢郓朋友玩篮球，因为它让你很放松. 要求：1.词数：50左右；可适当发挥，字迹工整，语言连贯，可适当发挥； 2．文中不得出现真实姓名和班级. Hello, My name is Want Hao, -thinkvisionm14
2017-2018上学期七年英语期末测评参考答案
1---5 BDCEA (第4小题答题卡有问题缺少E 学生涂A) 6---10 BAACB
11---15 AABBC 16--20 DCCCB 21--25 BBBAC 26—3 0 ABBAA
31---35 CAEFD
36--40 BCBDA 41--45 BCCAB
46—50CDCBA 51---55 BDBCA 56---60 CCDAB
61 Can I help you? /What can I do for you? 62 What about / How about/ Do you like /Do you want 63 How much 64 Here 65 You’re welcome./Not at all/That’s all right.-thinkvisionm14
注：此补全对话为开放性试题，参考答案不唯一，凡符合语境的正确表达均可得分.评卷教师可酌情处理.结合中考评分标准，大小写、单词拼写、标点等可忽略不计，但试卷讲评要严格要求，七年以鼓励为主
66 Do 67 doesn’t 68 When 69 Where 70 Who
71 tomatoes 72 has 73 ninth 74 is 75 them结合中考评分标准，大小写可忽略不计，可以缩写或者写完全形式都给分-thinkvisionm14
76 After class 77 think about 78 a pair of79 How about/ What about 80 watch TV-thinkvisionm14
注：此翻译题为开放性试题，参考答案不 唯一，凡符合语境的正确表达均可得分.评卷教师可酌情处理.结合中考评分标准，大小写、单词拼写、标点等可忽略不计，但试卷讲评要严格要求，七年以鼓励为主
81.Twenty . / 20. 82.July 10th. 83.Yes.84 .(In) Star Food Store 85.They eat fruit and a big birthday cake./Fruit and a big birthday cake.注：简答题，参考答案不唯一，有关键词就给分，凡符合语境的正确表达均可得分.评卷教师可酌情处理.学生答全句必须给分.结合中考评分标准，大小写、单词拼写、标点等可忽略不计，但试卷讲评要严格要求，七年以鼓励为主-thinkvisionm14
86 boring 87 math 88 English 89 history 90 5:00p.m.（5:00）
注：任务型阅读为开放性试题，参考答案不唯一，凡符合语境的正确表达均可得分.评卷教师可酌情处理.结合中考评分标准，大小写、单词拼写、标点可忽略不减分，讲评注意强调
One Version:Hello, I’m Wang Hao. I’m14 years old, and my birthday is May 1st.My telephone number is 7546321. I like dumplings and meat. Math is my favorite subject ,because it’s interesting. I like basketball, so I like playing basketball with my friends after school. I think it’s relaxing.注：1学生表达明确即可，以鼓励为主，我们的题量不少，不要刻意减分.2 如果学生两个都写了，教师评改学生写的第一篇文章，在第一篇作文得分的基础上减2分，尽量不给零分，以保护学生的学习兴趣为主.-thinkvisionm14
联想ThinkVison M14t便携式外接显示器有何特点
在去年的移动世界大会（MWC 2019）上，联想就已经展示过一款 ThinkVision M14 便携式显示屏。尽管不支持触控，但轻薄的设计，还是允许用户轻松扩展他们的屏幕显示空间。
今天，联想发布了功能升级后的 ThinkVision M14t 便携式触控显示器。其大小为 14 英寸，具有 FHD 的分辨率，支持十点触控，以及 4096 级的压感。
换言之，除了作为外接显示屏，ThinkVision M14t 也支持通过手写笔在上面撰写注释或进行素描绘图。值得一提的是，ThinkVision M14t 支持横向或纵向使用，且能够自动旋转屏幕方向。-thinkvisionm14
与去年的 ThinkVision M14 型号一样，M14t 也配备了可调节多个角度的支架。此外 M14t 具有 300 尼特的亮度，并且通过了德国莱茵 TÜV 的低蓝光认证，可最大程度减少眼睛的疲劳感。-thinkvisionm14
视频加载中...【Lenovo ThinkVision M14t Mobile Monitor】
ThinkVision M14t 的体型很是轻巧，仅 698g（1.5 磅）重。通过 USB-C 端口，你可将它连接到任何兼容设备上，然后实现音视频和数据的传输。
得益于 USB-C 电源直通功能，用户还可同时为屏幕和所连接的笔记本电脑充电。ThinkVision M14t 将于 9 月上市，售价为 449 美元（约 3150 RMB）。
最后，联想今日还宣布了多款显示器新品，包括 ThinkVision P32p-20、P27h-20、以及 T34w-20 。
