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简述硅胶在实际应用上的注意事项?

答案

参考答案:

如果气体带进液态水,则硅胶遇水容易破碎,为防止硅胶破碎在床层上,加粗孔硅胶和进塔时加分离器;由于硅胶的孔隙度大,它可以脱水,同时也可脱除重烃。在18℃时重烃的回收率为95%。

单项选择题

Imagine going to your doctor with a complaint of frequent headaches. Your doctor takes a prescription pad and writes a word on it. The word isn’t "aspirin", it’s "Mozart".

Many kinds of music can stir the imagination and produce p feeling. For some people, romantic composers such as Chopin and Tchaikovsky enhance feelings of love and compassion. Religious and spiritual music can help some people feel peace or lessen their pain. But one musician seems to have a unique ability to heal the human body-Mozart. Scientists have found Mozart’s music to be remarkable in its ability to calm its listeners. It can also increase their perception, and help them express themselves more clearly.

Many amazing cases have been documented using Mozart as a healing aid. For example, a tiny premature baby (早产婴儿) named Krissy, who weighed just 1.5 pound at birth, was on total life support. Doctors thought she had little chance of survival. Her mother insisted on playing Mozart for Krissy, and thinks it saved her daughter’s life. Krissy lived, but she was very small for her age and slower than the average child. At the age of four, she showed an interest in music and her parents gave her violin lessons. To their astonishment, Krissy was able to play musical pieces from memory that were far beyond the ability of an average four-year-old. Playing music helped her improve in all areas of her life.

Other stories have emerged about the effect of Mozart’s music. Officials in Washington State report that new arrivals from Asia learn English more quickly when they listen to Mozart. In Edmonton, Alberta, Canada, Mozart string quartets (弦乐四重奏) in city squares seem to calm pedestrian traffic. Even animals and seemingly inanimate objects respond to Mozart. In France. cows serenaded (对……唱/奏小夜曲) with Mozart give more milk, and in Japan, the yeast used to make sake (日本清酒) is ten times better when it "listens" to Mozart.

Why Mozart, rather than Bach or the Beatles Any kind of music can have an effect on some people. But Mozart has more balance. It isn’t too fast or too slow; it’s just right. Don Campbell. who wrote a book called The Mozart Effect, says, "It’s like food. A hot spicy meal will affect you differently than a sweet dessert. And while you might love these foods, they aren’t good for you to eat every day. You need simple, nutritious food on a steady basis. That’s the way Mozart is. It’s like a nutritionally balanced meal that brings order and harmony to your body. \

According to the passage, Mozart’s music can ().

A. arouse p feelings

B. lessen traffic jams

C. make a person imaginative

D. help improve a person s expressive ability

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