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【单选题】
下列各组离子 一定能 大量共存的是 ( )A.
在含大量Fe 3+ 的溶液中：NH 4 + 、Na + 、Cl － 、SCN －
B.
碳酸氢钠溶液： K + 、 SO 4 2- 、 Cl - 、 H +
C.
在 c (OH － ) =10 —13 mol/L 的溶液中：NH 4 + 、Al 3+ 、SO 4 2 － 、NO 3 －
D.
在pH =1的溶液中：K + 、Fe 2+ 、Cl － 、NO 3 －
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反馈参考答案：
举一反三
【单选题】关于私有地址,下面说法正确的是( )。
A.
类私有地址范围为10.0.0.0~20.0.0.0
B.
B类私有地址范围为172.0.0.0~172.15.0.0
C.
C类私有地址范围为192.168.0.0~192.168.255.255
D.
D类有1个，为244.0.0.0
【单选题】________ in health，he persisted in doing the experiment. [ ]
A.
As he was poor
B.
Poor as he was
C.
Poor was he
D.
Poor he was though
【单选题】______in health,he insisted on doing the experiment.
A.
As he was poor
B.
Poor as he was
C.
Poor was he
D.
Poor he was though
【单选题】He was in poor health. He could not make his voice ______ .
A.
hear
B.
to hear
C.
heard
D.
to be heard
【单选题】________, Mr. Smith managed to send his daughter to school.
A.
As he was a poor man
B.
A poor man as he was
C.
Poor man as was he
D.
Poor man as he was
【简答题】Would he help the poor if he (he)______a super star?
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