问题 不定项选择

如图甲,线圈abcd从静止自由下落开始计时,t1时刻ab边恰好以速度匀速进入磁场,t2时刻cd边进入磁场,之后有一段时间线圈完全在磁场中运动,t3时刻ab边将离开磁场,t4时刻cd到达磁场下边界,线圈恰好受力平衡,则下列说法正确的是

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A.线圈的速度时间图象可能如图乙所示

B.电流以逆时针方向为正,则线圈的电流时间图象可能如图丙所示

C.线圈进磁场过程和出磁场过程通过ab边的电量相等

D.线圈进磁场过程和出磁场过程产生的焦耳热相等

答案

BC

单项选择题 A1/A2型题
完形填空

第二节 完形填空(共20小题;每小题1.5分,共30分)

As a teenager, I felt I was always letting people down. I rebellious(叛逆)on the outside, __16__ on the inside I wanted people to __17__.

Once I left home to hitchhike(搭便车)to California with my friend Penelope. The trip wasn’t __18__, and there were many times I didn’t feel safe. One situation in particular __19__ me grateful to still be alive. When I returned home, I was different-----not so outwardly sure of myself.

I was happy to be home. But then I noticed that Penelope, who was __20___ with us, was wearing my clothes. And my __21__ seemed to like her better than me. I wondered if I would be __22__ if I weren’t there. I told my mom, and she explained that __23__ Penelope was a lovely girl, no one could __24__ me. I pointed out, “She is more patient and is neater than I have ever been.” My mom said these were wonderful __25__, but I was the only person who could fill my __26__. She made me realize that even with my __27__, ------ and they were many-----I was a loved member of the family who couldn’t be replaced.

I became a searcher, __28__ who I was and what made me unique. My __29__ of myself was changing. I wanted a solid base to start from. I started to resist pressure to __30__ in ways that I didn’t like any more, and I __31__ who I really was. I came to feel much more __32__ that no one can ever take my place.

Each of us __33__ a unique place in the world. You are special, no matter what others say or what you may think. So __34__ about being replaced. You __35__ be.

16.A. as           B. and                   C. but                   D. for

17.A. leave         B. replace        C. receive                 D. like

18.A. easy          B. hard                  C. fun                   D. long

19.A. made         B. kept                  C. left                   D. forced

20.A. playing       B. staying        C. eating                  D. travelling

21.A. family        B. friends        C. relatives                D. neighbors

22.A. loved         B. mentioned     C. cared                  D. missed

23.A. since         B. as            C. while                 D. unless

24.A. scold         B. replace        C. compare               D. match

25.A. qualities       B. girls          C. people                D. times

26.A. character      B. role           C. task                  D. form

27.A. faults         B. advantages     C. manners               D. pities

28.A. looking       B. looking back         C. giving up      D. seeking out

29.A. picture        B. view               C. sense          D. idea

30.A. think         B. learn               C. change              D. act

31.A. hated         B. wished              C. celebrated     D. expected

32.A. sure          B. doubtful             C. happy        D. lonely

33.A. takes         B. catches              C. seizes               D. holds

34.A. talk          B. forget              C. care          D. argue

35.A. mustn’t       B. shouldn’t           C. can’t         D. needn’t