问题
单项选择题
碳酸饮料含有丰富的（）气体。
A.一氧化碳
B.二氧化碳
C.苏打水
D.氧气
答案
参考答案：B
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碳酸饮料含有丰富的（）气体。
A.一氧化碳
B.二氧化碳
C.苏打水
D.氧气
参考答案：B
Music and Behavior Where did you go yesterday? Did you hear 41 at any of those places? Today most stores and restaurants play music. You might 42 hear music in an office or on a farm. Scientists believe that music changes the 43 people behave. According to some scientists, the sound of western classical music makes people 44 richer. When a restaurant plays classical music, people spend 45 money on food and drinks. When the restaurant plays 46 music, people spend less money. With 47 music, people spend even less. Scientists also 48 that loud , fast music makes people eat faster. In fact, people 49 their food faster when the music gets faster. Some restaurants play fast music during their 50 hours. This gets people to eat faster and leave more quickly. In this way, restaurants 51 make more money. Some scientists think that music makes you think and learn better. They say 52 music helps students to be more active. It is true that people earn better when they are 53 . And listening to music can help you relax. The 54 time you hear music somewhere, be 55 . It might change the way you do things.
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