Every winter heavy smog（煙霧） usually hits Harbin.All primary and middle school students don't have classes during the smoggy days.What should we do to prevent the smog harming us in this weather？
（1）Open the window and let fresh air in.
（2）Eat more fruit and vegetables.
（3）Do more outdoor sports，such as jogging and playing basketball.
（4）Wear a mask over mouths and noses when we go outside.
（5）Stay inside as much as possible instead of going outside .（ ）
【考點(diǎn)】常識．
【答案】C
【解答】
【點(diǎn)評】
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發(fā)布：2024/4/20 14:35:0組卷：3引用：4難度：0.6
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