题干

在显微镜下观察到的物像暗淡,偏左上方,如何操作才能使它明亮并位于视野中央?(    )

A:换用小光圈,装片向右下方移动

B:换用大光圈,装片向左上方移动

C:换用小光圈,装片向左上方移动

D:换用大光圈,装片向右下方移动

上一题 下一题 0.0难度 选择题 更新时间:2018-08-03 09:09:28

答案(点此获取答案解析)

B

同类题1

假定你是中学生李华。在一位名叫TigerMom的学生家长的博客上,你看到如下内容。请你根据博客内容、写作要点和要求,给这位家长回复。

    I'm the mother of a fourteen-year-old. I have a rule for my daughter: be among the top 5 students or get punished in one way or another. She has been doing very well in school, but some friends of mine keep telling me that I put too much pressure on her. Am I wrong?

写作要点:

1)表明自己的看法;

2陈述自己的理由(可举例说明);

3)提出至少两条建议。

要求:1)短文词数100左右。

2)内容充实,结构完整,语意连贯。

Hi, TigerMom,

    What puzzles you is actually a puzzle for many parents in China. My idea is



                                                                                                                                                                                                 Yours
                                                                                                                                                                                                  LiHua