试题与答案

用惰性电极电解下列各稀溶液,经一段时间后,溶液的pH值保持不变的是 A.AgNO

题型:选择题

题目:

用惰性电极电解下列各稀溶液,经一段时间后,溶液的pH值保持不变的是   

A.AgNO3溶液

B.NaCl溶液

C.H2SO4溶液

D.K2SO4溶液

答案:

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题型:阅读理解

Many scientists find that colors can change people’s feelings. It’s very interesting. Some colors can make people feel relaxed, and some colors can make people feel nervous. Now,this kind of knowledge is being used in many places. For example,school walls are always painted green because green makes students feel relaxed. It is also good for the students’ eyes. Some bookings they’ve learned from scientific studies. The color red makes people hungry. Many fast food restaurants have red furniture or walls. Soft colors like pink and light blue make people feel relaxed,so they spend more time eating. Loud music may be nices are also green or light blue for the same reason. Restaurant owners not only have to know how to make food,but also have to know how to make  money. Here are some   thi at first,but it soon makes people want to leave. Hard seats also make customers want to eat quickly and leave. Many restaurants,especially fast food restaurants, use this knowledge to make customers eat faster.

小题1:How does the color green make the students feel?

A.Hungry.

B.Nervous.

C.Angry.

D.Relaxed.小题2:How does the color red make most people feel?

A.Hungry.

B.Comfortable.

C.Excited.

D.worried.小题3:Which color isn’t mentioned in this passage?

A.Green.

B.White.

C.Light blue.

D.Red.小题4:What do many fast food restaurants do?

①Play loud music. ②Play soft music.

③Have hard seats. ④Paint their walls red.

A.①②③

B.①③④

C.①②④

D.②③④小题5:What’s the best title for this passage?

A.Color and restaurant.

B.Use color to make money.

C.Color and science.

D.Use color to change feelings.

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