锅炉若严重缺水时，此时错误地上水，会引起水冷壁上联箱及汽包产生较大的热应力，甚至导致水冷壁爆破。
参考答案：对
急性阑尾炎临床症状发生的顺序一般是（）。
A.先恶心，后低热，再右下腹痛
B.先低热，几小时后右下腹痛，呕吐
C.先呕吐，随即发热，腹痛
D.先上腹痛，然后恶心或呕吐，右下腹痛
E.没有明确的顺序
Your blunt treatment of disputes would put other people in a negative frame of______, with the result that they would not be able to accept your proposal.
A．mind
B．idea
C．intention
D．wish
