搜题请搜索小程序“爱下问搜题”
问题 单项选择题

朱砂、珍珠等药物的粉碎方法是（）

A.混合粉碎

B.串油

C.水飞

D.低温粉碎

E.串料

答案

参考答案：C

解析：朱砂、炉甘石、珍珠、滑石粉等矿物、贝壳类药物可用水飞法粉碎。选C

阅读理解

Mike was a small boy,and he didn't like washing his hands.Every day his mother said to him: "Mike,your hands are very dirty  again.Go and wash them."But Mike never washed them well.He only put them in the water for a minute and took them out again.

Mike's aunt lived in another street. One day,she came to stay with Mike's parents,and she came with her small son,Ted.Ted was a year younger than Mike,and he didn't like washing his hands,either .First the boys were with their parents,then they went to play.When they were sitting,Mike looked at Ted's hands and said: "My hands are dirtier than yours.""Certainly they are." Ted answered,"you are a year older than I am."

判断正误：

小题1:Mike always washed his hands carefully.

小题2:Mike was older than Ted.

小题3:Ted's hands were a little cleaner than Mike's.

小题4:Mike's aunt lived in the street next to his house.

小题5:Mike's hands were dirtier than Ted's because he was older.
查看答案
判断题

一般认为，生产型公司合理的最低流动比率是2。（ ）
查看答案