题目内容

Question23

A. They consumed lots of petrol.
B. They took two passengers only.
C. They were difficult to drive.
D. They often broke down.

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Question24

A. They were produced on the assembly line.
B. They were built with less costly materials.
C. They were modeled after British cars.
D. They were made for ordinary use.

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Question25

A. It made news all over the world.
B. It was built for the Royal family.
C. It marked a new era in motor travel.
D. It attracted large numbers of motorists.

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H3PO4的共轭碱是( )。

A. PO43-
B. HPO42-
C. H2PO4-
D. 以上都是

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PO43-的共轭酸是( )。

A. H3PO4
B. H2PO4-
C. HPO42-
D. 以上都是

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Question23

A. They consumed lots of petrol. B. They took two passengers only. C. They were difficult to drive. D. They often broke down.

Question24

Question25

H3PO4的共轭碱是( )。

PO43-的共轭酸是( )。

A. They consumed lots of petrol.
B. They took two passengers only.
C. They were difficult to drive.
D. They often broke down.