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【单选题】
某些船舶的海水系统在出海阀前设有温度调节阀,其目的是______A.
控制海水系统最高温度
B.
控制海水系统最低温度
C.
调节淡水温度
D.
调节滑油温度
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举一反三
【单选题】I wish that you ______ such a bad headache, then you would have enjoyed the concert. [ ]
A.
hadn't had
B.
didn't have
C.
shouldn't have
D.
won't have
【单选题】Some people believe that if you ______ a mirror, you ______ have seven years of bad luck.
A.
break will
B.
will break would
C.
break would
D.
broke will
【简答题】如图所示的四个过程，从能量转化和转移的角度看，属于机械能转化为内能的是
【简答题】电解液由纯硫酸（相对密度1.84）和蒸馏水按一定比例配置而成，相对密度一般为（）。
【简答题】___________ for the job you have applied for will leave a bad impression on the interviews. A．Not prepared B．Not having prepared C．Not prepare D．Not being prepared
【单选题】If you _____ what he said, you could have avoided repeating such a bad mistake.
A.
paid attention to
B.
had paid attention to
C.
noticed
D.
had noticed to
【简答题】电解液为 和 按一定比例配置而成。
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