如何防止反渗透膜结垢?

题型:问答题 简答题

问题:

如何防止反渗透膜结垢?

考点:电厂水化验员考试电厂水化验员考试题库
题型:问答题 简答题
Jack is a high school student. He is seventeen years old. He is in Grade two now. he had a bad stomachache three days ago. He went to see the doctor. The doctor gave him a bottle of medicine. Here are the words on the bottle:
Stomachache medicine
You must shake(摇晃) the bottle before you take it.
You must take it three times a day.
You should take it after meals.
Age                        Dose(剂量)
More than 16                 three teaspoons (药勺)each time
8---15                       two teaspoons each time
5---7                       one teaspoon each time
Notes: the children under 4 years old CANNOT take this medicine. Please put it in a dry and cold place. Take it before Oct.31, 2009.
根据短文内容,选择正确答案。
小题1:Jack should take the medicine __________.
A.before mealsB.after mealsC.before sleepD.after sleep
小题2:Jack should take ______of the medicine a day.
A.1 teaspoonB.4 teaspoonsC.9 teaspoonsD.2 teaspoons
小题3:Jack should ___________ before taking the medicine.
A.eat no foodB.drink no milk
C.shake the bottleD.drink some water
小题4:Children can take the medicine when they’re ______ years old.
A.under 4B.more than 4C.more than 16D.between 8and 15
小题5:Jack _______ the medicine after October 31,2009.
A.has to takeB.has to soldC.can takeD.can’t take
题型:问答题 简答题

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