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【单选题】
1 8 .某溶液可能含有Cl - 、SO 4 2- 、CO 3 2- 、NH 4 + 、Fe 3+ 、Al 3+ 和K + 。取该溶液100mL,加入过量NaOH溶液,加热,得到0.02mol气体,同时产生红褐色沉淀;过滤,洗涤,灼烧,得到1.6g固体;向上述滤液中加足量BaCl 2 溶液,得到4.66g不溶于盐酸的沉淀。由此可知原溶液中( )A.
至少存在5种离子
B.
Cl - 一定存在，且c（Cl）≥0．4mol/L
C.
SO 4 2- 、NH 4 + 、 一定存 在，Cl - 可能不存在
D.
CO 3 2- 、Al 3+ 一定不存在，K + 可
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举一反三
【单选题】______ what she said, we were not angry with her.
A.
In despite
B.
In spite
C.
Despite
D.
Spite
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A.
heard
B.
in
C.
but
D.
someone
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A.
lying; lay; laid
B.
laying; lied; lain
C.
lying; laid; laid
D.
laying; lay; lain
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haven't heard
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didn't hear
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hadn't heard
D.
won't hear
【单选题】Which of the following best explains the meaning of “ She said we should finish the work as soon as possible. ” ?
A.
She said that we were going to finish the work.
B.
She ordered that we must finish the work.
C.
She suggested that we finish the work in time.
D.
She advised us not to finish the work unless we meet the deadling.
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【单选题】______ what she said, we were not angry with her.
A.
In despite
B.
In spite
C.
Despite
D.
Spite