题目内容

Which is NOT of the changes that Jack noticed about himself from his stay in the countryside?(5.0)

A. He became healthier.
B. He enjoyed teaching.
C. He improved his relationship with people.
D. Helping others brought great personal satisfaction.

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参考答案如下:一、选择题:1.D2.C3.C4.B5.B6.B7.C8.C二、编程题:

我国工程岩体分级标准中岩石的坚硬程度确定是按照( )。

A. 岩石的单轴饱和极限抗压强度
B. 岩石的抗拉强度
C. 岩石的变形模量
D. 岩石的黏结力

在我国工程岩体分级标准中,表示软岩的岩石的单轴饱和极限抗压强度为( )。

A. 15~30MPa
B. <5MPa
C. 5~15MPa
D. <2MPa

取直径为50mm、长度为70mm的标准岩石试件,进行径向点荷载强度试验,测得破坏时的极限荷载为4000N,破坏瞬间加荷点未发生贯入现象。则该岩石的坚硬程度属于( )。

A. 坚硬岩
B. 较坚硬岩
C. 较软岩
D. 软岩