题目:
热处理方法有退火、正火、淬火、回火、表面热处理等五种.
答案:
参考答案:对
热处理方法有退火、正火、淬火、回火、表面热处理等五种.
参考答案:对
小燕子竟然推导出了0>5的错误结论.请你仔细阅读她的推导过程,指出问题到底出在哪里?
已知x>y,
两边都乘以5,得5x>5y;(1)
两边都减去5x,得0>5y-5x;(2)
即0>5(y-x).(3)
两边都除以y-x,得0>5.(4)
病人先有恶寒发热,继而恶寒消失,反恶热,伴有口渴喜饮,舌红苔黄,脉洪数,证属()。
A.表寒里热
B.风热犯肺
C.表里同病
D.寒证化热
E.表邪入里
Andy is the most unreasonable, pigheaded life form in the world, and he makes me so angry I could scream! Of course, I love him like a brother. I have to because he is my brother. More than that, he is my twin! That’s right. Andy and Amy(that’s me) have the same curly(卷曲的) hair and dark eyes and equally stubborn character. Yet, though we may look alike, on most issues(事情) we usually take completely opposite positions. If I say day, you can count on Andy to say night.
Just this week, the hot topic in school was all about the PTA’S proposal(提议) to adopt a school dress principle. Every student would be required to wear a uniform. Uniforms! Can you imagine? Oh, they would be uniforms in color. The dress style would be sort of loose and free.
I think a dress principle is a good idea. The reason is simple. School is tough enough without worrying about looking cool every single day. The fact is, the less I have to decide first thing in the morning, the better. I also wouldn’t mind not having to see guys wearing oversized jeans and shirts. And I certainly would welcome not seeing kids showing off designer clothes.
Andy is surprised at my opinion. He says he can’t believe that I would be willing to give up my all-American teenage birthright by dressing like — well, like a typical teenager. Last night, he even dragged out Mom and Dad’s high school photo albums. What a couple of peace-loving hippies(嬉皮士) they were!
The vote for or against uniforms took place later that day. The results of the vote and the headmaster’s decision will be announced next week. I wonder what it will be. I know how I voted, and I’m pretty sure I know how Andy voted.
How would you vote—for or against?
小题1:The story is about___________.
A.a school policy decision that will affect parents and students
B.a personal experience and is told in the first person
C.a historical event and is told in the third person
D.a conflict of opinions between boys and girls小题2:Amy’s position on school uniforms is most likely based on________.
A.logical conclusions drawn form her own observation and personal experience
B.an aggressive reaction to what she has been told by people in authority
C.her preference for designer-labeled clothes
D.not liking anything her brother likes小题3:Which of the following is the best statement of Andy’s position?
A.School clothing should reflect parents’ values.
B.Teenagers should never follow the latest fashions in dress.
C.How one dresses should be an expression of one’s individuality.
D.Wearing school uniforms means one less decision every morning.小题4:What is the best title for the text?
A.A School Dress Principle.
B.My Stubborn Twin Brother
C.Endless Fights with My Brother
D.For or Against?--- That Is the Question
患者感心悸、胸闷,过去无心脏病史,最可能诊断()
A.冠心病
B.扩张型心肌病
C.二尖瓣关闭不全
D.主动脉瓣关闭不全
E.肥厚性心肌病
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A.客户可以了解贸易相关知识
B.讨论贸易相关话题
C.了解阿里巴巴新闻动态
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