口算.

7×4＋25＝____

42÷7－3＝____

关于秦岭—淮河一线两侧自然人文情况的叙述，正确的是（　　）

在Rt△ABC中,∠C=90°,若sin A= $\frac{1}{2}$ ,则∠B的度数是(   )

读短文并按要求完成相应任务
    Today was the first day of the summer holiday．My friends and I went out together．We went swimming in the swimming pool．We swam for an hour．I did not swim well，but I enjoyed it very much．We had lunch in a fast—food restaurant．I had a sandwich and some orange juice．Alice had a hamburger．Jack had a lot of French fries and some cola．We went shopping in a supermarket．I bought a pink dress．Alice bought a pretty hat．Jack did not buy anything．
    We went home at 3 o'clock in the afternoon．We 、were tired，but we were happy．

根据拼音填汉字组词。

zhì	fěi
脍____人口	获益____浅