J857 CrNi焊条使用前应在烘干箱内经400℃烘干()h,焊条使用时取出放在温度为100~150℃的保温桶内,随取随用。
A.0.5
B.1
C.1.5
参考答案:B
We all jumped with joy at the exciting news, After all, we ______forward to the chance for many years.
A.are looking
B.were looking
C.have been looking
D.had been looking
伟伯提出的划分社会层次结构的标准包括()标准。
A.社会
B.道德
C.职业
D.经济
E.政治