题干

如图所示,甲图为显微镜下所观察到的图象.在显微镜下,若将甲图转换成乙图,载玻片的移动方向和视野的明暗变化分别是(  )

A:向右移动,视野变亮

B:向右移动,视野变暗

C:向左移动,视野变亮

D:向左移动,视野变暗

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答案(点此获取答案解析)

D

同类题1

根据短文内容及首字母提示,补全空格内单词,使短文完整、通顺。

    Young people are the future masters of the country. Being a youth is one thing, and being a good one is a____. Everyone tries to be good, but not everybody has the right idea about it. Age will test youth, and youth will create age. Because we'll have heavy responsibilities(责任) upon our shoulders in future. We must educate o____ to be good. What are the qualifications(素质) for a good young person?

    A good youth should have these qualities. First of all, health, a healthy body is the best riches.W____ it, nothing can be done well. If you are poor in health, you'll have to take m____ day after day. Even you can't work, do sports and so on. Secondly, one must be of good quality. Always do something for others. Help those in trouble and care about the people around you. If everyone did the same, what a w____ world this would be! Thirdly, one must have the ability to work with others. Cooperation(合作)and communication are two important keys to better human relations. Everyone needs friends b____ no one can live through his life alone or do everything he wants to.Besides the examples above, patriotism(爱国主义)is the one we should never forget. Patriotism m____ a love of one's country. It is one of the h____ qualities of humans. Everyone should love his o____ country.

    I think a good youth of today should also have some training in art. If everyone can enjoy art and be able to make more of it for others, then people will live better and e____ more.

同类题4

阅读下列短文,根据短文内容选择最佳答案。

                                                                                              B

    When I was a little girl, my father loved to play catch (抛接球游戏) with me. I wasn't very good, but he would encourage me. He was always telling me “keep your eye on the ball” as I would not be able to catch even the easiest of throws.

    As I got older, we didn't play catch as much. If I had a problem, I would go to my father to ask for his advice. He would try to joke with me and say “keep your eye on the ball”. We would both laugh because usually that advice did not apply to(适用于) the problem, but he would try to make me smile.

    My father became ill in 1995 when I was 23. As he suffered from a stroke (中风), he could not speak. There weren't any more conversations. He could only mouth words, which were sometimes hard to understand. After a while, I seemed to be pretty good at reading his lips (嘴唇), even better than the nurses who were caring for him.

    During our last conversation, I was telling him about a problem I was having with my then boyfriend. Once again, I could read his lips: “Keep your eye on the ball.” We both smiled.

    That was the last time I saw my father before he passed away.

    Since then, when I get into a stressful situation I tell myself “keep your eye on the ball”.