皮皮学,免费搜题
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【单选题】
I sat ________ over my problem without finding a solution.
A.
preaching
B.
pondering
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举一反三
【多选题】空压机中间冷却的作用是()。
A.
降低下一级吸气温度
B.
提高输气系数
C.
减少功耗
D.
提高下一级吸气温度
【判断题】紫外分光光度法测试时,光线是180度穿过样品的
A.
正确
B.
错误
【单选题】Children are advised to _________ their food carefully in their childhood. .
A.
chew
B.
digest
C.
swallow
【判断题】甲午战争以后,新式企业多为清政府一手操办,或官办或官督合办。()
A.
正确
B.
错误
【判断题】柴油机中间冷却器的作用是将压缩空气冷却,使其密度进一步降低,以增加发动机的进气量,有利于提高柴油机性能。( )
A.
正确
B.
错误
【判断题】甲午战争以后,或官办或官督合办的新式企业多为清政府一手操办。()
A.
正确
B.
错误
【单选题】空压机中间冷却器的作用是()。
A.
降低下一级吸气温度
B.
提高输气系数
C.
都不是
【单选题】Parents are advised to put books __________ they are easily accessible to children .
A.
which
B.
where
C.
in which
D.
who
【简答题】In America, most people don’t get enough sleep. Children aged 5 to 12 are advised to sleep 10 to 11 hours every night, but most of them can’t sleep that long. A study found that about 41 million Ameri...
【单选题】Children are advised not to climb mountains, for any form of mountaineering has its ( ) dangers.
A.
intrinsic
B.
unique
C.
distinctive
D.
inner
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