题目内容

What is the main subject of this conversation

A. San Francisco.
B. Forest fires.
C. Redwood trees.
D. Survival skills.

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Despite the fact that the area had been hit by the severest drought in twenty years, a(n) _________ harvest was gathered in.

A. desirable
B. wishful
C. bumper
D. ideal

We are all surprised to know that Mr. Zhang has been（）in that case.

A. involved
B. protested
C. withdrawn
D. recovered

The heavy burden of the life made her _________ the old way of stealing.

A. revel in
B. relate to
C. revert to
D. revive in

( )是焊接工艺评定试验的前提因素，亦即焊接工艺评定的基础。

A. 钢材的选择
B. 材料的焊接性试验
C. 焊接方法的选择
D. 焊接参数的确定