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问题 单项选择题

主根的高度（）。

A.以脚的后跟骨上沿点为基准

B.以后帮高为基准

C.以后跟凸点为基准

答案

参考答案：A

选择题

设a、b是满足ab＜0的实数，那么（　　）

A．|a+b|＞|a-b|

B．|a+b|＜|a-b|

C．|a-b|＜||a|-|b||

D．|a-b|＜|a|+|b|
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选择题
The owner of the cinema needed to make a lot of improvements and employ more people to keep it running, _____ meant spending tens of thousands of pounds.
A. who
B. that
C. as
D. which
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