问题
单项选择题
聚合物的化学降解是指在（）的作用下发生的降解反应。
A.剪切
B.微生物
C.氧化
D.光
答案
参考答案：C
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聚合物的化学降解是指在（）的作用下发生的降解反应。
A.剪切
B.微生物
C.氧化
D.光
参考答案：C
A great many people are disappointed because of unrealistic expectations. Walking up to a department store’s cloth counter, a(n) 1 young woman said, “I want to buy this material for a new dress. How much does it cost?” “Only one 2 per yard,” replied the smirking (自鸣得意的) male clerk. Not to be taken back by the funny words, the woman said,” That’s fine! I’ll take ten yards.” With 3 written all over his face, the clerk 4 measured out and wrapped the cloth, then held it out teasingly, 5 forward to receive his “ 6 ”. The woman got the package quickly from the clerk and pointed to a little old man standing beside her. “Grandpa will pay the bill instead of me,” she 7 . He was no doubt disappointed. But in the course of living, many people are 8 when others do not 9 their expectations. In order to be happy, some expectations must be dropped. These three particular 10 and unhealthy expectations are some of the main causes: 1. Expect too much 11 .When others say, “Thank you,” or in any way to show their gratitude, be happy. It is a gift! 2. Expect others to make you happy. They simply cannot do that. Make yourself happy and 12 your joy with others. 3. Expect not to be 13 . At times, people will simply not come through for you in the way you need. 14 them and move on. Get rid of these three unrealistic expectations and you can begin to expect more 15 right away!
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