PM2.5——Killer in China 10:00 a.m. April 1st,2014

AQI

PM2.5細(xì)顆粒物。PM10可吸入顆粒。AQI空氣質(zhì)量指數(shù)。

PM2.5（單位：μg/m3）表示每立方米空氣中可入肺顆粒物的含量。

根據(jù)表格所提供的信息選擇最佳答案。

1.The AQI in Beijing is much __________ than that in Sanya.

A．better

B．worse

C．bad

2.The air in ___________ is both heavy pollution.

A．Shanghai and Beijing

B．Beijing and Tangshan

C．Tangshan and Harbin

3.If you are in Tangshan, you had better _________.

A．have outdoor activities

B．breathe fresh air

C．stay at home

4.The amount of _______in the air in Sanya is the same as that in Harbin.

A．SO2

B．O3

C．CO

5.Which of the following is not TRUE according to the information above?

A．The air in Harbin is middle pollution, we’d better not go out to work.

B．We can know the AQI of April 1st from the table.

C．O3 in Shanghai is the most of all the cities.

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