27. – Shall we stop now? –_____.
A. Oh dear! B. Not at all. C. I can manage it myself D. If you like
26. Every boy and every girl _____ very hard at his or her lessons, _____ to go to university some day.
A. work; hoping B. works; to hope C. works; hoping D. work; to hope
25. He is used to _____ every morning now though he used not to _____ it in the past.
A. jogging; doing B. jogging; do C. jog; do D. jog; doing
24. Mary is the only one of the girls who _____ often late for school.
A. is B. are C. comes D. get
23. It is the Party _____ makes _____ for us to live a happy life.
A. who; it is possible B. which; it possible C. which; it is possible D. that; it possible
22. I appreciate _____ to relax with you on this nice island.
A. to have time B. having time C. having no time D. to have no time
21. – Do you often listen to _____ radio?
– No, in fact, I often watch _____TV.
A. /; / B. the; the C. /; the D. the; /
26. 如图8所示，质量m1＝0.3kg的小车静止在光滑的水平面上，车长L＝1.5m，现有质量m2＝0.2kg可视为质点的物块，以水平向右的速度v0=2m/s从左端滑上小车，最后在车面上某处与小车保持相对静止。物块与车面间的动摩擦因数＝0.5，取g＝10 m/s2，求
(1)物块在车面上滑行的时间t；
(2)要使物块不从小车右端滑出，物块滑上小车左端的速度′ 不超过多少。
雅安中学09-10学年高二上学期九月月考
＝0.5，取g＝10 m/s2，求
′ 不超过多少。