下列污染会造成空气中CO含量超标的是（ ）
A．机动车排放大量废气
B．商店较集中
C．生活污水的大量排放
D．人流量太大
A、机动车排放大量废气含有一氧化碳，所以会造成空气中CO含量超标，故A正确；
B、商店较集中不会产生一氧化碳，所以不会造成空气中CO含量超标，故B错误；
C、生活污水的大量排放会污染水资源，而不是产生一氧化碳，所以不会造成空气中CO含量超标，故C错误；
D、人流量太大不会产生一氧化碳，所以不会造成空气中CO含量超标，故D错误．
故选：A．
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| Dear Tony, How was your day 1 ? Did you have fun 2 ? I didn't have a very fun day. I 3 my cousins. It rained 4 . In the morning, I stayed in the house and watched videos, played computer games, and 5 .In the afternoon, Uncle Martin put some of his old things out in the yard and had a yard 6 ! 7 , it was 8 of boring. 9 came to the sale 10 the weather was so bad. See you soon. Nick | ||||
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