第一节 语法和词汇知识(共15小题；每小题1分，满分15分)
从A、B、C、D四个选项中，选出可以填入空白处的最佳选项，并在答题卡上将该项涂黑。
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21．---Could
I call you by the first name? ---Yes,
you_______. A. will B. could C. may D. might 22．______ is obvious ______he has finished his work. A. What; that B. That; that C. It; that D. It; what 23．In ______, the northerners are keen on dumplings while the southerners are fond of rice. A. common B. total C. general D. particular 24．Although I can walk about, there is still a ____ pain in my leg. A. weak B. soft C. strong D. slight 25. Charlie Chaplin was loved by all who watched the film for his determination _____ overcoming difficulties. A. to B. with C. in D. on 26．We expressed the hope________ they would come and visit our hometown again. A. which B. that C. why D. how 27．Whether life will continue on the earth for millions of years ______will depend on ____this problem can be solved. A. to come; if B. coming; if C. to come; whether D. coming; whether 28. Towards _______evening, ________ cold rain began to fall down. A. an; a B./ ; a C. the; the D. the; a 29. The man couldn’t _____the fact that the lost watch was found in his house. A. explain for B. account for C. amount to D. refer to 30. All that can be done _______. A. has been done B. has done C. have done D. were done 31. I, who ____ your teacher, will try my best to help you with your English. A. is B. are C. be D. am 32. If a thing is worth ______, it must be well ______. A. doing; done B. to do; doing C. to do; done D. being done; doing 33. There was a terrible noise _____ the sudden burst of light. A. followed B. following C. to be followed D. being followed 34. ____ be sent to work there? A. Who do you suggest B. Who do you suggest that should C. Do you suggest who should D. Do you suggest whom should 35. The building _______now beside the park was designed by a famous designer. A. to be built B. being built C. built D. building |
17.
(13分)半径为R的光滑半圆形轨道固定在水平地面上，轨道与水平面相切于A点。一个质量为m的小球以某一初速度从A点冲上该轨道后, 恰能通过该轨道的最高点B ，最终落到水平地面上的C点，如图所示。试求:
⑴小球通过轨道起点A时的初速度vo 的大小
⑵小球到达AB圆弧中点D时对轨道的压力F的大小
⑶ 小球的落地点C与轨道最低点A之间的距离
山东省新泰市高二年级开学考试
16. (12分) 额定功率为80kW的汽车，在平直公路上行驶的最大速度是20m/s。汽车的质量为2.0×103kg。如果汽车从静止开始做匀加速直线运动，加速度的大小是2m/s2，运动过程中阻力不变。求：
(1)汽车受到的阻力多大？
(2)3s末汽车的瞬时功率是多大？
(3)汽车维持匀加速运动的时间是多少？
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