题目内容

下述地球物理勘探方法中，（）属于电磁法勘探方法。（）

A. 充电法
B. 频率测深法
C. 激发极化法
D. 探地雷达

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下述钻探方法中（）为岩芯钻进方法。（）

A. 土层圆筒形钻头冲击钻进
B. 孔底全面钻进
C. 钻粒钻进
D. 金刚石钻进

At first _____ I thought it was Mary, but when I looked again I saw it was Jane.

A. sight
B. look
C. watch
D. stare

The old woman drew a deep _______ at the sad news.

A. signal
B. sign
C. symbol
D. sigh

He never told us why he was late for last meeting, ______？

A. wasn't he
B. didn't he
C. did he
D. had he