题目内容

软土地基处理施工技术中的反压护道适用于路堤高度不大于( )的极限高度,非耕作区和取土不太困难的地区。

A. 1.0~1.5倍
B. 1.5~2.0倍
C. 2.0~2.5倍
D. 2.5~3.0倍

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In the eighties, the Americans as a whole ______.

A. became richer
B. became poorer
C. lived a poorer life than in the seventies
D. needed more jobs to support their families

沿线路分段进行,每段距离以( )为宜,多在地势平坦,或两侧有可利用的山地土场的场合采用联合填筑法。

A. 10~20 cm
B. 20~30 cm
C. 20~40 cm
D. 30~50 cm

适用于挖掘深且短的路堑的施工挖掘方法是( )。

A. 单层横向全宽挖掘法
B. 多层横向全宽挖掘法
C. 分层纵挖法
D. 通道纵挖法

How many people are there in the United States in 1987

A. 259 million.
B. 117 million.
C. 175 million.
D. 240 million.

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