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【单选题】
水的硬度按其所含可溶性盐类的组成分为两类：暂时硬度和永久硬度。下列哪项不是暂时硬度A.
碳酸钙
B.
碳酸镁
C.
重碳酸钙
D.
重碳酸镁
E.
硫酸钙
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举一反三
【简答题】现代计算机采用( )作为主要器件。
【简答题】造成货物自然减量的原因主要有？
【简答题】3 passages about Recognizing Speaker’s Attitude Passage 2:
【单选题】How to maintain a good marriage?
A.
A man and a woman should follow every of their own impulse respectively.
B.
A good marriage takes some level of compromise between the husband and the wife.
C.
A mall and a woman should both have to endure dreadful self-sacrifice of the soul.
D.
A man and a woman should stop growing or changing.
【单选题】Young people are redefining for themselves ________it means to be a man or a woman.
A.
how
B.
that
C.
which
D.
what
【单选题】How to maintain a good marriage?
A.
A man and a woman should follow every of their own impulse respectively.
B.
A good marriage takes some level of compromise between the husband and the wife.
C.
A man and a woman should both have to endure dreadful serf-sacrifice of the soul.
D.
A man and a woman should stop growing or changing.
【单选题】How to maintain a good marriage?
A.
A man and a woman should follow every of their own impulse respectively.
B.
A good marriage takes some level of compromise between the husband and the wife.
C.
A man and a woman should both have to endure dreadful self-sacrifice of the soul.
D.
A man and a woman should stop growing or changing.
【单选题】How a man or a woman is customarily introduced to each other insocial activities?
A.
A woman is first introduced to a woman.
B.
A man is first introduced to awoman.
C.
Introductions are based on a person's social position.
D.
There is no definite order in introduction.
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