问题
单项选择题
两台以上蛙夯同时作业时，左右间距不小于（）。
A．3m
B．5m
C．6m
D．8m
答案
参考答案：B
解析：
蛙式打夯机的使用要点是：两台以上蛙式打夯机同时作业时，左右间距不小于5m，前后不小于 10m。相互间的胶皮电缆不要缠绕交叉,并远离夯头。
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两台以上蛙夯同时作业时，左右间距不小于（）。
A．3m
B．5m
C．6m
D．8m
参考答案：B
解析：
蛙式打夯机的使用要点是：两台以上蛙式打夯机同时作业时，左右间距不小于5m，前后不小于 10m。相互间的胶皮电缆不要缠绕交叉,并远离夯头。
阅读下列短文,从所给的四个选项中选出最佳答案. A young man once asked Albert Einstein, the great scientist, 1 the secret of success（成功） is. The scientist told him that the secret of success is 2 work. A few days later the young man asked him the same question again. Einstein was very 3 . He did not say 4 , but wrote 5 words on a piece of paper and handed it 6 the young man. The young man looked at the piece of paper. 7 it was written: A=X+Y+Z. “What does this mean?” asked the young man. “A means success,” explained the old scientist. “X stands for（代表） hard work, Y stands for good methods（方法）, and Z…, Z means stopping 8 and getting down to work.”
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