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问题 单项选择题

深基坑工程的挖土方案，主要有放坡挖土、中心岛式挖土、盆式挖土和逆作法挖土。其中( )无支护结构。

A．放坡挖土
B．中心岛式挖土
C．盆式挖土
D．逆作法挖土

答案

参考答案：A

问答题 简答题

简单描述电气灭火的两个特点。
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选择题

In my view, London’s not as expensive in price as Tokyo but Tokyo is ______in traffic.

A．the most organized

B．more organized

C．so organized as

D．as organized as
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