问题
填空题
在电缆送出端的杆及转弯杆上应采用（）号滑轮，直线杆采用2号滑轮。
答案
参考答案：4
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在电缆送出端的杆及转弯杆上应采用（）号滑轮，直线杆采用2号滑轮。
参考答案：4
| 选择合适的单词填空，将短文内容补充完整。 | |
to his mother do . On the second day, he's going to his grandparents. He's going by . On the third day, he's going to a trip his parents. He will come back home on the sixth day. He's coming plane. At last, he's going to the and buy some food. He will a good time. |