题目内容

2His hair is () than hers.

A. long
B. longer

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3Shanghai is one of () cities in the world.

A. most expensive
B. the mostexpensive

4Alaska is () state in the United States.

A. larger
B. the largest

Hongkong is () Greenland.

A. smaller
B. smaller than

国际单位制（SI）的基本量及基本单位是（）。

A. 长度，单位m
B. 质量，单位kg
C. 时间，单位s
D. 力，单位N