关于装配图画法下列说法正确的是（）。A.全装配图中，两零件的接

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问题单项选择题

关于装配图画法下列说法正确的是（）。

A.全装配图中，两零件的接触面应画两条线

B.同一零件的剖面线必须同向间隔一致

C.装配图中，剖面线间隔必须一致

D.装配图中，相邻零件的剖面线方向必须相反

答案

参考答案：B

填空题

根据句意用括号内所给单词的适当形式填空.

1．I'm a singer and _________(I) name's Dale.

2．Is _________(she) book new?

3．It's nice __________(meet) you.

4．Let _________(we)learn and read English.

5．What's the __________(boy) name?

6．His __________(one) name is Jones.

7．Six and eight ___________(be) fourteen.

8．In the small village(村子), there are only nine __________(family) now.

9．How are ____________(your)?

10．Can you ____________(answer) the question.

问答题

卖方延期交货时，买方有权撤销合同。