无菌罐在升温是灌装机可以不给蒸汽障。
参考答案：错
There was something wrong with his ears. He couldn't _____ anything at all. [ ]
A. hear from
B. listen to
C. hear
D. listen
店员发展一个日租包奖励多钱？（）
A.10元
B.20元
C.30元
D.45元
