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为了更好地控制流速，程序升温色谱仪上一般装有（）。
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氨压缩机出口角阀泄漏的原因是什么？
How does TV affect our lives? It can he very helpful to people who carefully choose the shows that they watch. Television can increase our knowledge of the outside world; there are high-quality programs that help us understand many fields of study: science, medicine, the arts, and so on. Moreover, TV benefits very old people who can't often leave the house, as well as patients in hospitals. It also offers non-native speakers the advantage of daily informal language practice; they can increase their vocabulary and practice listening On the other hand, there are several serious disadvantages to TV. Of course, it provides us with a pleasant way to relax and spend our free time, but in some countries, people watch the TV for an average of six hours or more a day. Many children stare at a TV screen for more hours each day than they do anything else, including studying and sleeping It's clear that the TV has a powerful influence on their lives and that its influence is often negatk'e. Recent studies show that alter only thirty seconds of TV, a person' s brain 'relaxes" the same way that it does just before the person falls asleep. Another effect of TV on the human brain is that it seems to cause poor concentration. Children who view a lot of TV can often concentrate on a subject for only fifteen to twenty minutes; they can pay attention only for the amount of time between commercialsAnother disadvantage is that TV often causes people to become dissatisfied with their own lives. Real life does not seem as exciting to these people as the lives of actors on the screen. To many people, TV becomes more real than reality, and their own lives seem boring. Also, many people get upset or depressed when they can't solve problems in real life as quickly as TV actors seem to. On the screen, actors solve serious problems in a half-hour program or a thirty-second commercialBefore a child is fourteen years old, he or she views eleven thousand murders on the TV. He or she begins to believe that there is nothing strange about fights, killings, and other kinds of violence. Many studies show that people become more violent after certain programs. They may even do the things that they saw in a violent showThe most negative effect of the TV might be people's addiction to it. People often feel a strange and powerful need to watch TV even when they don't enjoy it. Addiction to a TV screen is similar to drug or alcohol addiction, people almost never believe they are addictedRead Passage and decide whether the following statements are True or False. Write T for True and F for False against the number of each of the statements on your Answer Sheet21. TV programs are definitely helpful to anyone22. There are positive as well as negative effects of TV on our lives23. TV can help improve one's foreign language24. Watching a lot of TV won't affect our concentration at all25. Some children spend more time watching TV than studying and sleeping26. The lives of people in TV shows seem to be very exciting27. TV programs can help people solve problems as quickly as the actors28. TV violence makes some people, especially children, take violence in real Life forgranted29. One of the symptoms of addiction to television is a strong desire to watch it even ifthe program is not interesting30. The passage mainly discusses the advantages of TV
对无线电发射机的基本要求有是什么？
走进餐厅时，服务员给您的第一条湿巾，适宜用来擦手、擦脸、擦嘴、擦汗。
电泵组成中的变压器属于哪一部分。（）
张某继承了一套商铺，在办理产权登记前就以300万元的价格卖给了李某，并由李某使用。张某在办理了产权登记后，又以380万元的价格将这套商铺卖给王某，并办理了过户手续。对此，下列选项中正确的说法是（）。
所谓“独阴不生，独阳不长”说明阴阳之间的何种关系（）
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陶渊明思想比较复杂，其中有（）