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【简答题】
对一批牌号为Q235的钢筋进行抽检，钢板厚度为20mm，得到各试样的屈服强度检测值分别为：5MPa、220．3MPa、222．OMPa、225．8MPa、229．3MPa；钢筋拉断后伸长率分别为：21%、20%、23%、27%、31%。 该批钢筋试样屈服强度检测平均值为()。（单项选择题） A.225．OMPa B.215．03MPa C.200．OMPa D.222．4MPa 该批钢筋试样伸长率平均值为()。（单项选择题）A.3MPa B.21．7MPa C.20．7MPa D.24．4MPa 该批钢筋是否满足拉伸性能要求？()（单项选择题）A.满足 B.不满足 C.不能确定 该批钢筋为带肋钢筋。()（判断题） 钢材的力学性能随厚度的增加而降低。()（判断题）
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【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
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【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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