From now on I want you to keep me () of how things are going on with you.
A. to inform
B. informed
C. informing
D. be informed
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The population bomb is a () that has already happened in some parts of the world, with terrible results.
A. distress
B. miracle
C. disaster
D. giant
Corruption in government was exposed through the agency of the press.()
A. Dishonesty
B. Virtue
C. Prejudice
Diligence
钢材对温度相当敏感,下面观点正确的是()。
A. t=200℃以内钢材性能没有很大变化,430~540℃之间强度急剧下降
B. t=200℃以内钢材性能没有很大变化,600℃时强度很低
C. t=400℃以内钢材性能没有很大变化,600℃时强度很低
D. t=100℃时强开始下降
碳素结构钢又称为普碳钢,其钢号对应为Q195、Q215、Q235和Q275,其中( )。
A. Q代表屈服强度,数字为屈服强度的上限值
B. Q代表屈服强度,数字为屈服强度的下限值
C. Q代表屈服弹性系数,数字为屈服强度的上限值
D. Q代表屈服弹性系数,数字为屈服强度的下限值