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【单选题】
下列沉淀中易溶于1 mol / L的NH 4 Cl溶液中的有(括号内为溶度积常数)( )。A.
Fe (OH) 3 ( 8.0 × 10 -16 )
B.
Mg (OH) 2 ( 1.8 × 10 -11 )
C.
Al ( OH) 3 ( 1.3× 10 -33 )
D.
Cr (OH) 3 ( 6.3 ×10 -31 )
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反馈参考答案：
举一反三
【简答题】阴茎由 3条海绵体构成,背侧两条为( ),腹侧一条为( )。
【判断题】原材料库和半成品库,因为有载重汽车直接出入的频率比较高,采用低地面式较有利。流通库,因在库内分货、配货,并根据商品的不同,采取不同的存放方式,采取高地面式较为合适。
A.
正确
B.
错误
【简答题】American black bears appear in a variety of colors despite(尽管) their name. In the eastern part, most of these bears have shiny black fur, but in the west they grow brown, red, or even yellow coats. To...
【单选题】听力原文： American black bears appear in a variety of colors despite their name. In the eastern part of their range, most of these brown, red, or even yellow coats. (32) To the north, the black bear is ac...
A.
Gray or white.
B.
Brown or red.
C.
Red or yellow.
D.
Yellow or red.
【单选题】Despite its gargantuan heft, John Irving's 11th novel moves nimbly from a standing start to warp speed. Legions of the author's admirers will still be searching for a comfortable way to accommodate th...
A.
Hardship of poor people
B.
disorder between various people
C.
children's experiences under the strange and uncomfortable circumstances
D.
rebellion of youth against their parents
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