皮皮学,免费搜题
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搜题
【判断题】
于无机酸类废液,实验室可以收集后进行如下处理:将废酸慢慢倒入过量的含碳酸钠或氢氧化钙的水溶液中(或用废碱)互相中和,再用大量水冲洗。
A.
正确
B.
错误
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举一反三
【单选题】Don’t be too hard() the child.
A.
in
B.
on
C.
of
D.
out
【单选题】I found ____ hard to get out of bed on cold winter mornings.
A.
that
B.
this
C.
it is
D.
it
【单选题】Don’t get that ink on the shirt, for it _____.
A.
doesn’t wash out
B.
won’t be washing out
C.
isn’t washing out
D.
won’t wash out
【单选题】Hard as he tried,he still __________ not get the accident out of his mind.
A.
might
B.
should
C.
could
D.
would
【单选题】胡萝卜素在体内可转化为?
A.
维生素A
B.
维生素B
C.
维生素C
D.
维生素D
【单选题】β—胡萝卜素在体内可转化为
A.
维生素A
B.
维生素B1
C.
维生素C
D.
维生素K
E.
维生素E
【单选题】胡萝卜素在体内可转化为
A.
维生素A
B.
维生素B1
C.
维生素B2
D.
维生素D
【单选题】I tried hard to get some information about the new technology out of his mouth,but he remained __________.
A.
quiet
B.
secret
C.
silent
D.
calm
【单选题】胡萝卜素在体内可转化为:
A.
VitA
B.
VitD
C.
VitB1
D.
VitE
【简答题】Once you get into a bad habit, you’ll find it hard toget out of it. (英译汉)