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问题 单项选择题

使用经纬仪时，取盘右盘左观测结果得平均值能消除经纬仪（）的误差。

A.视准轴不垂直横轴。横轴不垂直竖轴

B.视准轴不垂直竖轴，水准管轴不垂直与竖轴

C.水准管轴不平行于视准轴

D.都不对

答案

参考答案：A

选择题

--- How wide is the river?

--- About ________.

A．100-metres-wide

B．100 meters wide

C．100-metre-wide

D．100 meter wide
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选择题

His ________ to be admitted to Wuhan University was held back by his poor English.

A．ambition

B．inspiration

C．destination

D．approval
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