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【单选题】
使用自动排气高压灭菌锅(如日本产 HVE-50 型自动高压灭菌器)之前,必须先检查以下三个水位,表述正确的是( ) 。A.
腔内水位 高于最下面的圆形加热盖 0.3cm 左右；前方排气瓶水位必须高于 low ；后方的排气瓶中排气管必须低于水面。
B.
腔内水位低于最下面的圆形加热盖 3.0cm 左右；前方排气瓶水位必须处于 high 和 low 之间；后方的排气瓶中排气管必须高于水面。
C.
腔内水位低于最下面的圆形加热盖 0.3cm 左右；前方排气瓶水位必须处于 high 和 low 之间；后方的排气瓶中排气管必须高于水面。
D.
腔内水位低于最下面的圆形加热盖 0.3cm 左右；前方排气瓶水位必须低于 high ；后方的排气瓶中排气管必须高于水面。
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举一反三
【单选题】If a student has a friend visiting him at a time when he Should review his lessons, he could entertain his friend and find some other time to review his lessons.
A.
Y
B.
N
C.
NG
【单选题】I didn’t finish reading that French book, neither
A.
did he
B.
didn’t he
C.
he did
D.
he could
【单选题】土地市场供需调控的方向中，选择调控目标的确定依据是( )。
A.
一定时期内土地市场发展措施
B.
一定时期内土地市场发展目标
C.
一定时期内土地市场发展手段
D.
一定时期内土地市场发展水平
【简答题】A．He didn't look for a tie. B．He couldn't find the tie. C．He didn't want the tie. D．He couldn't try the tie on.
【单选题】The author failed to learn Greek because______.
A.
he lacked sufficient intelligence
B.
he could not master the writing system
C.
of his parents' attitude to the subject
D.
the wrong teaching approach was used
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