CAS-OB中OB是指()。
A.加热
B.加铝
C.吹氧
参考答案:C
—“Dear Frank, when will our wedding be?”
—“Ah, when? God knows.” He said, and ____ away from her, walked rapidly away.
A.turning
B.turned
C.turn
D.to turn
钢制压力容器进行磁粉或者渗透检测,合格级别为()级。
A.Ⅰ
B.Ⅱ
C.Ⅲ