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【简答题】

阅读理解。
Traveling is one of the most important activities and people have been interested in it for many years.
Modern traffic develops fast, so traveling to different places has become much easier than before.
Staying healthy while traveling can make your trip happier. But do you know how to keep healthy
during a trip? The following information may be useful for you.
Before leaving:
● Wear comfortable shoes, a hat and sunglasses.
● Take some necessary medicine with you. They can be used when you get sick or have other problems.
● If you do lots of sports like walking or climbing on your trip, you should do some exercise for weeks
or months before you leave.
While traveling:
● Be sure not to eat dirty food or bad fruit.
● Have enough time to take a rest during your trip.
● Tap water (自来水) is not safe, so drink bottled water and always clean the cover on the bottle.
1. You should _____ before you leave your home for a trip.
A. get some medicine
B. clean the cover
C. drink much water
D. wear warm clothes
2. You had better not _____ while you are having a trip.
A. wear sunglasses
B. be too tired
C. wear a hat
D. take a rest
3. If you _____ while traveling, your trip will be happier.
A. walk fast
B. eat too much
C. keep healthy
D. climb the mountain

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参考答案:
举一反三

【单选题】若自来水中的含有Fe3+、Al3+,应( )。

A.
加入氢氧化钠掩蔽
B.
加入三乙醇胺掩蔽
C.
加入亚硫酸钠掩蔽
D.
加入氰化钾掩蔽

【单选题】自来水的pH为()。

A.
6.0~8.5
B.
6.5~8.5
C.
6.0~8.0
D.
6.5~8.0

【单选题】有自来水的低氟区防龋的是

A.
含氟牙膏
B.
氟饮水
C.
氟盐
D.
氟片
E.
氟滴剂
相关题目:
【单选题】若自来水中的含有Fe3+、Al3+,应( )。
A.
加入氢氧化钠掩蔽
B.
加入三乙醇胺掩蔽
C.
加入亚硫酸钠掩蔽
D.
加入氰化钾掩蔽
【单选题】自来水的pH为()。
A.
6.0~8.5
B.
6.5~8.5
C.
6.0~8.0
D.
6.5~8.0
【单选题】有自来水的低氟区防龋的是
A.
含氟牙膏
B.
氟饮水
C.
氟盐
D.
氟片
E.
氟滴剂
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