Where is air pollution from?Where ___ air pollution ___ from?2. We need air to survive.Air ___ us ___.3. There are many animals in the zoo.There are a ___ ___ animals in the zoo.4. We use water to wash our hands.We use water ___ our hands.5. In the end, it was...
都是不正确的。come是实意动词，疑问句是要用助动词的，所以不能用is。第二个因为does已经是单三了，就不用comes了。
阅读短文,根据语篇要求填空,使短文通顺、意思完整。每空限填一词。Just imagine a world where air pollution is no longer a problem. Clean air is all around us. People don't have to worry66.polluting the air every time they drive their cars.They no longer need to face the problem of not ha...
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A call for epidemiology where the air pollution isdoi:10.1016/S2542-5196(17)30163-8Cathryn TonneThe Lancet Planetary HealthTonne C. A call for epidemiology where the air pollution is. Lancet Planet Health 2017; 1: e355-e356.
Haze(雾霾) is a kind of air pollution where dust(尘), smoke and other dry particles(颗粒)stay together and cover the blue skies. It's difficult for Chinese people to enjoy the blue skies because there is serious hazy weather almost everywhere in China.Reasons for the heavy haze can includ...
Is there more pollution now than in the past? Do you think the city is cleaner or dirtier than the countryside? Why? Do you think wind has any effect on air pollution? How? In what ways can air pollution be reduced effectively?
Passage 2Imagine a world where air pollution is no longer a problem. Clean air is all around us. People don't have to worry about polluting the air every time they drive their cars. They no longer need to face the problem of no having enough fuel either.Although scientists have been try...
Imagine a world where air pollution is no longer a problem.Clean air is all around us.People don't have to worry about polluting the air every time they drive their cars.They no longer need to face the problem of not having enough fuel either.Although scientists have been trying for many...
What is the Air Quality Index, or AQI? The Air Quality Index, often referred to as AQI, is a federal measure of the amount of air pollution, reported on a six-color spectrum from green (good) to hazardous (maroon). There are five pollutants evaluated as part of the index: ozone, par...