题目内容

He is a very ______ character; he is never relaxed with strangers.

A. self-confident
B. self-conscious
C. self-evident
D. self-serving

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You don't have to ______ yourself. I think you did the right thing putting your mother in a nursing home.

A. justify
B. hinder
C. indulge
D. appoint

施工安全管理安全目标策划中，对控制和杜绝因公负伤、死亡事故的发生的概率应控制在( )。

A. 负伤频率在6‰以下、死亡率为零
B. 负伤频率在8‰以下、死亡率为零
C. 负伤频率为零、死亡率为零
D. 负伤频率为零、死亡率在6‰以下

工作D有三项紧前工作A、B、C，其持续时间分别为：A=3、B=7、C=5，其最早开始时间分别为：A为4、B为5、C为6，则工作C的自由时差为( )。

A. 0
B. 1
C. 3
D. 5

The Untied States and Canada are lands of ______ except for the Indians, who are the only tree natives.

A. emigrants
B. immigrants
C. dwellers
D. inhabitants