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【判断题】
无定形沉淀要在较浓的热溶液中进行沉淀,加入沉淀剂速度适当快A.
正确
B.
错误
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反馈参考答案：
举一反三
【单选题】The word 'phenomena' in the passage is closest in meaning to
A.
animations.
B.
exceptions.
C.
extravagances.
D.
occurrences.
【单选题】● (71) has many elements: text, audio sound, static graphics images, animations, and full-motion video. (71)
A.
Multimedia
B.
Database
C.
File
D.
Document
【单选题】天河石,又称“亚马逊石”,是微斜长石的蓝绿色变种,半透明至微透明。其颜色为纯正的蓝色、翠绿色,质地明亮,透明度好,解理少的为优质品可做为()的代用品。
A.
祖母绿
B.
翡翠
C.
橄榄石
D.
翠榴石
【单选题】We can infer from the passage that______.
A.
because the land is so low, the sea can flow back into the rivers at high tide
B.
Dutch engineers do not reclaim land from a passage between two islands
C.
water is the main enemy of Holland because it has a lot of rivers
D.
the fighting against water has made the country higher and better
【单选题】（71)has many elements: text, audio sound, static graphics images, animations, and full-motion video.
A.
Multimedia
B.
Database
C.
File
D.
Document
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