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【多選題】
下列鑒別方法可行的是
A.
用Ba(NO3)2溶液鑒別S042-和SO32-
B.
用氨水鑒別Al3+、Mg2+
C.
用鹽酸鑒別SO42-和CO32-
D.
用NaOH溶液鑒別Fe2+和Fe3+
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舉報(bào)參考答案：
舉一反三
【單選題】The prize will go to the writer ________ story shows the most imagination.
A.
that
B.
which
C.
whose
D.
what
【單選題】It was with the help of the local guide ______ the mountain climber was rescued.
A.
that
B.
who
C.
when
D.
how
【單選題】Great changes ________ in China i n the past 20 years.
A.
took place
B.
have taken place
C.
were taken place
D.
have been taken place
【單選題】Do you know the reason _________ Jack missed the English class this morning?
A.
for which
B.
when
C.
of which
D.
which
【單選題】John hurried into the classroom to avoid ________ by his teacher.[
A.
seeing
B.
see
C.
to b e seen
D.
being seen
相關(guān)題目：
【單選題】The prize will go to the writer ________ story shows the most imagination.
A.
that
B.
which
C.
whose
D.
what
【單選題】It was with the help of the local guide ______ the mountain climber was rescued.
A.
that
B.
who
C.
when
D.
how
【單選題】Great changes ________ in China i n the past 20 years.
A.
took place
B.
have taken place
C.
were taken place
D.
have been taken place
【單選題】Do you know the reason _________ Jack missed the English class this morning?
A.
for which
B.
when
C.
of which
D.
which
【單選題】John hurried into the classroom to avoid ________ by his teacher.[
A.
seeing
B.
see
C.
to b e seen
D.
being seen
參考解析：
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