锅炉发生严重减水时,此时错误的上水,会引起水冷壁及汽包产生较大的(),甚至导致()。
参考答案:热应力,水冷壁爆破
I don't think the experiment is________failure.At least we have gained________experience for
future success.[ ]
A. /; a
B. a; the
C. a; /
D. /; /