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【简答题】
在稀的砷酸溶液中,通入 H 2 S 以制备硫化砷溶胶 (As 2 S 3 ) ,该溶胶的稳定剂是 H 2 S ,则其胶粒结构式是 __________________, .外电场作用下,胶粒往_____极移动,称为____________.
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举一反三
【单选题】I think you are at the end of your ________ this time and need to turn to Pro. Smith for advice.
A.
resources
B.
careers
C.
features
D.
issues
【单选题】Most people think that English is ___________ useful language, but some students think it’s ___________ unimportant subject.
A.
a, an
B.
a, a
C.
an, an
D.
an, a
【简答题】JSP页面的page指令中的( )属性用于设置脚本语言。
【单选题】I'm your class today so you must do I tell you. [ ]
A.
instead of, what
B.
in the form of, like
C.
in charge of, as
D.
looking at, as
【简答题】连词成句。 1. I, Ann, needs, think, help, some ___________________________ 2. please, the station, is, where, me, excuse ___________________________ 3. the clothing shop, the post office, next to, is _____...
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