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【单选题】
煮沸消毒金属器械时,为了增强杀菌作用和去污防锈,可加入A.
氯化钠
B.
硫酸镁
C.
亚硝酸钠
D.
碳酸氢钠
E.
稀盐酸
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皮皮学刷刷变学霸
举一反三
【简答题】解放思想、实事求是辩证统一的基础是（ ）。
【简答题】用所给词的适当形式填空（20分） 小题1:She is old enough to look after __________(she). 小题2:Mr Black is very angry, because the students are playing ____(noise ) in the classroom. 小题3:He is ________(thin) of the twins....
【单选题】According to the passage, it is clear that the force of the moon ______.
A.
is not as important as that of the wind
B.
is less than half that of the sun
C.
is the primary cause of the alternate rise and fall of the surface of the seas
D.
does not influence the rise and fall of the surface of the seas
【简答题】尺寸线和尺寸界线用 画出
【单选题】He was a good swimmer, so he ______ swim to the river bank when the boat sank.
A.
could
B.
might
C.
succeeded to
D.
was able to
【简答题】设 、 为两个随机事件, , , , 则 。
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