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【简答题】
钢的常用淬火方法有______,______,______和______。
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参考答案:
举一反三
【单选题】根据人的视觉暂留特性,连续的动画或视频,每秒的帧频应该达到
A.
10
B.
12
C.
24
D.
36
【简答题】选择意思正确的词组填入下列横线上。 call up, take away, ran out of, look through, get along 1. The teacher ______________my mobile phone because I used it in class. 2. I need some money. I'm going to _____________ the ...
【单选题】牛奶、饮料、葡萄酒、糖浆等物品宜用的除菌方法是
A.
巴氏消毒法
B.
过滤除菌法
C.
流通蒸汽法
D.
高压蒸汽灭菌法
E.
紫外线照射法
【单选题】He is the very lecturer,______ experience impressed us greatly at the conference yesterday. [     ]
A.
who
B.
whom
C.
which
D.
whose
【单选题】What especially impressed us was the way_____the girl studied foreign languages. 
A.
不填
B.
which
C.
by which
D.
how
【单选题】Next door to ours ______, who has impressed us with his special talking style.
A.
where lives an old man
B.
where does an old man live
C.
lives an old man
D.
does an old man live
【单选题】The history teacher is having a lesson, but Frank is thinking about other things. The teacher asks, 'Frank, do you know who is the first president of the United States?' Frank stands up, but he can't ...
A.
True.
B.
False.
【单选题】Mary broke a   ______while she was washing up.
A.
tea cup
B.
a cup of tea
C.
tea’s cup
D.
cup tea
【单选题】与调速阀相比较,节流阀的显著特点是 () ?
A.
调节范围大
B.
结构简单,成本低
C.
流量稳定性好
D.
最小压差的限制较小
【判断题】任意工质经任一可逆循环,微小量 δQrev/T 沿循环的积分为零。
A.
正确
B.
错误
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