题目内容

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.

查看答案

搜索结果不匹配？点我反馈

更多问题

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.

查看答案

H3PO4的共轭碱是( )。

A. PO43-
B. HPO42-
C. H2PO4-
D. 以上都是

查看答案

PO43-的共轭酸是( )。

A. H3PO4
B. H2PO4-
C. HPO42-
D. 以上都是

查看答案

关于酸碱指示剂,下列说法错误的是( )。

A. 指示剂本身是有机弱酸或弱碱
B. 指示剂的变色范围越宽越好
C. HIn与In-的颜色差异越大越好
D. 指示剂的变色范围全部或部分落在滴定突跃范围之内

查看答案

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.

Question25

H3PO4的共轭碱是( )。

PO43-的共轭酸是( )。

关于酸碱指示剂,下列说法错误的是( )。

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.