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【单选题】
制备甘油栓时,会产生大量泡沫是什么原因?A.
碳酸钠与硬脂酸产生皂化反应，产生二氧化碳，生成大量泡沫。
B.
甘油与碳酸钠反应产生的泡沫
C.
硬脂酸与甘油反应产生的泡沫
D.
碳酸钠与水反应产生的泡沫
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【单选题】They planted some young trees in the garden _______ it was the best time for them.A．whereB．thatC．u
A.
6.They planted some young trees in the garden _______ it was the best time for them. A．where
B.
that
C.
until
D.
when
【单选题】以下说法正确的是____。
A.
Windows NT操作系统分为Windows NT Server和Windows 2000
B.
Windows NT Server是客户端软件
C.
Windows NT Workstation是Windows NT Serve 的升级版本
D.
尽管Windows NT版本不断变化，但不变的是两个概念：工作组模型和域模型
【简答题】B. 语法填空 Everybody sometimes loses things.People often lose things when 1 are travelling or when they are in a hurry.That's 2 there are lost and found 3 at airports and stations.What can you do when yo...
【单选题】They ___ their hands the moment they saw each other after so many years.
A.
cringed
B.
clasped
C.
perpetual
D.
rooted
【单选题】They would refuse to go away they got what they demanded.
A.
unless
B.
provided that
C.
except that
D.
without
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