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搜题
【单选题】
某氧化物不溶于水,但溶于熔化的 NaOH 中,生成易溶于水的化合物,盐酸中滴加所生成化合物的水溶液,立即有白色沉淀产生,则原氧化物是 ( ) A . Al 2 O 3 B . MgO C . SiO 2 D . P 2 O 5A.
B.
C.
D.
D
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举一反三
【单选题】Where can you find this passage?
A.
In a car magazine.
B.
In an advertisement.
C.
In a newspaper.
D.
In a science book.
【单选题】Where can you possibly find this passage?
A.
In a political journal.
B.
In a fashion magazine.
C.
In a tourist handbook.
D.
In a literature review.
【单选题】Where can you find this sign?
A.
at a movie theatre
B.
at an airport
C.
at a restaurant
【单选题】Where can we most probably find this passage?
A.
A science magazine.
B.
A travel journal.
C.
A daily newspaper.
D.
A textbook.
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