题目内容

什么是微生物，分为几类，各有何特点？

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Internet-based social media will enable you to________more broadly.

A. see
B. play
C. work
D. network

Airbnb can be used to rent whole ______or houses or just a room within someone's home.

A. buildings
B. hotels
C. apartments
D. places

We did not even make enough money to cover the _______of food.

A. value
B. cost
C. money
D. price

He acted ________he had nothing to learn.

A. as if
B. since
C. for
D. as