题干
短文改错。
One summer evening, I was playing and ____ some childs ____ by a river. We saw a lot of frogs(青蛙) in the water. One of us said, “Let's to see ____ who can Catch most ____ frogs.” Then we began. After while____ we caught a lot. We are ____ having a good time when a farmer shouted at us. “Don't caught ____ frogs!” Then he told us how importance ____ they are to farming. They eat a lot of bad insects(害虫) every year, Caught ____ frogs must be stopped. After hear ____ that, we felt very sorry.
答案(点此获取答案解析）
with,children,see,the most,a while,were,catch,important,Catching/To catch,hearing
两种方案的移动通。费用y(元)与通话时间x(元)之间的关系，则以下说法错误的是( )
C02(g)+H2(g)，部分数据见下表(表中t2>t1）：