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问题 单项选择题

测定a点时的锥入深度，对于100g和76g分别为（）。

A.20mm±0.2mm和17mm

B.20mm和17mm±0.2mm

C.20mm±0.5mm和17mm

D.20mm和17mm

答案

参考答案：A

连词成句

连词成句。

1. school, how, home, it, from, your, is, to, far

                                                                           ?

2. you, tell, museum, about, the, could, something, me

                                                                           ?

3. tell, want, news, to, make, a, telephone, call, the, I, to , him

                                                                            .

4.  made, a, foolish, have, mistake, what, I

                                                                            !

5. where, museum, I, the, is, don't, know

                                                                              .                                                            

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填空题

采煤机的牵引特性是指（）、（）、（）与牵引速度的关系。
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