锯割扁钢时，尽可能从（）的一面锯下去。A.宽 B.窄 C.窄或宽 D.长_爱下问搜题

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问题单项选择题

锯割扁钢时，尽可能从（）的一面锯下去。

A.宽

B.窄

C.窄或宽

D.长

答案

参考答案：A

改错题

短文改错
    此题要求改正所给短文中的错误，对标有题号的每一行作出判断：如有错误(每行只有一个错误)，则按下列情况改正：
      该行多一个词：把多余的词用斜线划掉，在该行右边横线上写出该词，并也用斜线
划掉。
      该行缺一个词：在缺词处加一个漏字符号，在该行右边横线上写出该加的词。
      该行错一个词：在错的词下划一根线，在该行右边横线上写出改正后的词。

     Excuse me, Mrs Jones. Would you mind do me a
favour? I was just going to shopping, but
as soon as I shut my front door, I realize that
I had left my key in the house. Yet when I get
back, I will not able to get in. It was very
foolish for me. I needn't have come out at all,
because all the vegetables and fruits has been
bought by my husband. I only need some salt.
May I come in and climb across the fence(栅栏) into
my back garden? This is very kind of you. I wish
I didn't give you so much trouble.

1._________
2._________
3._________
4._________
5._________
6._________
7._________
8._________
9._________
10._________

填空题

制动时，使牵引电动机变为发电机，把产生的电能反馈到输电网去，同时产生制动力，这种制动方式称为（）。