出现沙林事故时不可用()物理消毒剂洗消。
A、溶剂
B、吸附剂
C、简易消毒剂
D、泡沫
参考答案:D
—Tina failed in the math test. She looks very sad.
—Let’s come to cheer her ________.
A.up
B.in
C.out
D.at
零件的焊接坡口、平面度等都应符合图样或技术要求。( )