【单选题】I wish that you ______ such a bad headache, then you would have enjoyed the concert. [ ]
【单选题】Some people believe that if you ______ a mirror, you ______ have seven years of bad luck.
【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.