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【简答题】
数量巨大的,巨额的 (s-)
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举一反三
【单选题】下列各组离子在强碱性溶液中可以大量共存的是 ( )
A.
Na+、K+、Cl-、SO42-
B.
K+、NH4+、Cl-、NO3-
C.
Na+、Mg2＋、NO3-、Cl-
D.
Al3+、K+、SO42-、NO3-
【简答题】名词解释:移动定位技术
【单选题】听力原文：W: I understand you took one of Professor George's classes, didn't you? Is that interesting? M: Let me put it this way. I can safely say that I never needed a cup of coffee to keep me awake in hi...
A.
Professor George's class is very interesting.
B.
Professor Jordan's class is more interesting.
C.
He hasn't attended Professor Jordan's class.
D.
He hasn't attended Professor George's class.
【单选题】下列各组离子在强碱性溶液中可以大量共存的是 [ ]
A.
Ca 2+ K + CO 3 2- Cl -
B.
H + Fe 2+ Cl - NO 3 -
C.
Na + Ba 2+ NO 3 - Cl -
D.
Na + Al 3+ NO 3 - Cl -
【单选题】听力原文：W：I understand you dropped Professor Jordan's classes and took one of Professor George's classes，didn't you? Is he that interesting? M：Let me put it this way. I can safely say I will never need a...
A.
Professor George's class is too boring.
B.
Professor Jordan's class is more interesting.
C.
Professor George's class is very interesting.
D.
Professor George never allows students to drink coffee in class.
【单选题】下列各组离子,在强碱性溶液中可以大量共存的是 ( )
A.
K + 、 Na + 、 HSO 3 -
B.
Ba 2+ 、 SO 4 2- 、 NO 3 -
C.
NH 4 + 、 Cl - 、 NO 3 -
D.
K + 、 Na + 、 ClO -
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