问题
选择题
正确量取7.5mL液体，应选用的一组仪器是
①5mL量筒 ②10mL量筒 ③20mL量筒 ④胶头滴管（ ）
A．③④
B．①②④
C．②④
D．只有③
答案
由题意可知，量取7.5mL液体，应该选用的仪器是量筒、胶头滴管．选取量筒时，选取一次量取全部液体的最小规格的量筒，所以要选10mL量筒．
故选C．
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正确量取7.5mL液体，应选用的一组仪器是
①5mL量筒 ②10mL量筒 ③20mL量筒 ④胶头滴管（ ）
A．③④
B．①②④
C．②④
D．只有③
由题意可知，量取7.5mL液体，应该选用的仪器是量筒、胶头滴管．选取量筒时，选取一次量取全部液体的最小规格的量筒，所以要选10mL量筒．
故选C．
| 阅读理解。 | |
| Americans spend their weekends in different ways. But usually they choose the same aim(目的)—to rest, to enjoy beautiful places and to enjoy the time with their family and friends． Some Americans hold parties on Saturday night. 1._____Then they won't get up until 9,10 or even 11: o'clock next morning．As soon as they get up they will go to the nearest corner shop to buy the daily newspaper(日报).2._____It will help them to decide what to do on Sunday afternoon. Before going out on Sunday, they will have a meal, which is called "brunch"—"br" from "breakfast" and " unch" from "lunch3._____After brunch some Americans may have a picnic with their family or friends. They will take many things with them, such as fresh vegetables, sea food,drinks,table cloth(桌布)and so on. Usually they drive to a beautiful park, a lake or the seaside. 4._____It is the biggest meal of the week and all family members try to present(出席).Weekends are to be welcome everywhere.5_____. | |
| 根据短文内容，将其方框中的五个句子还原到短文中： | |
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