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【单选题】
金属在生产和日常生活中有重要的应用。下列说法不正确的是A.
明矾水解形成胶体能吸附水中悬浮物，可用于水的净化。
B.
现代建筑的门框架，常用古铜色的硬铝制造，硬铝含有的元素是Al、Cu、Mg等。
C.
金属在自然界中一般以化合态存在，越活泼的难冶炼。
D.
日常生活中应用的金属材料一般为合金，合金的熔点一般比组分。
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get
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stay
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A.
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forced
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the; a
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不填; a
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D.
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are ridded of
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B.
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【单选题】— It is reported that it will rain this Sunday. — . We’re planning to go boating that day.A．I h
A.
— It is reported that it will rain this Sunday. — ____. We’re planning to go boating that day. A．I hope not
B.
I couldn’t agree
C.
I hope so
D.
I don’t think so
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