试题与答案

如图所示的空间中存在着正交的匀强电场和匀强磁场,从A点沿AB、AC方向绝缘地抛出

题型:不定项选择

题目:

如图所示的空间中存在着正交的匀强电场和匀强磁场,从A点沿AB、AC方向绝缘地抛出两带电小球,关于小球的运动情况,下列说法中正确的是

[ ]

A.从AB、AC抛出的小球都可能做直线运动

B.只有沿AB抛出的小球才可能做直线运动

C.做直线运动的小球带正电,而且一定是做匀速直线运动

D.做直线运动的小球机械能守恒

答案:

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When you finish writing, look at your outline again. Did you really follow it or did it change as you wrote? Many times you find different ideas as you write. Look at your central paragraphs. What are their main ideas now? Are theses ideas in the introduction? I often write the introduction again to fit the paper after I finish writing.

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B.提纲

C.中心

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A. Don’t use big words.

B. Give examples with details.

C. Say the same thing with fewer words.

D. A, Band C.

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A. Look at your outline again.

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题型:单项选择题

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A.“80后”的青年夫妇更喜欢过二人世界的生活

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C.“80后”的青年夫妇只要能够独立生活,就不会选择与双方父母亲共同生活

D.有些“80后”的青年夫妇因工作压力大而不想要孩子

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