下列属于定型密封材料的是()。_建筑工程_全学科试题题库

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下列属于定型密封材料的是()。
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I hear many parents complaining that their teenage children are rebelling. I wish it【C1】______so. At your age you【C2】______be growing away from your parents. You should be learning to【C3】______on your own two feet. But take a good look at the【C4】______rebellion. It seems that teenagers are all taking the same way of showing that they【C5】______with their parents.【C6】______striking out boldly on their own, most of them are clutching at one anothers hands for【C7】______. They claim they want to dress as they please. But they all wear the same【C8】______. They set off in new directions in music. But somehow they all end up huddled round【C9】______the same record. Their reason for thinking or acting in thus-and-such away is【C10】______the crowd is doing it. They have come out of cocoon(蚕茧)into a larger cocoon. It has become harder and harder for a teenager to【C11】______the popularity wave and to go his or her own way. Industry has firmly carved out a teenage market. These days every teenager can learn from the advertisements【C12】______a teenager should have and be. And many of todays parents have come to【C13】______high marks for the popularity of their children. All this【C14】______a great barrier for the teenager who wants to find his or her own【C15】______. 【C16】______the barrier is worth climbing over. The path is worth following. You may want to listen to classical music instead of going to a party. You may want to collect rocks when【C17】______is collecting records. You may have some thoughts that you dont care to【C18】______at once with your classmates. Well, go to it. Find yourself. Be yourself. Popularity will come with the people who respect you【C19】______who you are. Thats the only kind of popularity that really【C20】______.【C1】A．isB．wereC．have beenD．had been

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