化学分析剂分为()四个等级。A、优级纯 B、分析纯 C、化学纯 D、实验室试剂

题型:多项选择题

问题:

化学分析剂分为()四个等级。

A、优级纯

B、分析纯

C、化学纯

D、实验室试剂

考点:化学水处理工化学水处理工题库
题型:多项选择题

生殖能力最旺盛期是()。

A.青春前期

B.青春期

C.性成熟期

D.更年期

E.老年期

题型:多项选择题

面向数据流的软件设计方法,一般是把数据流图中的数据流划分为什么样的两种流再 将数据流图映射为软件结构

A.数据流与事务流

B.变换流与事务流

C.信息流与控制流

D.变换流与数据流

题型:多项选择题

晶体硅(Si)是一种重要的半导体材料.冶炼硅时常用碳在高温下还原二氧化硅制得粗硅,反应的化学方程式是:SiO2+2C

高温
.
Si+2CO↑现要制备含硅21kg的粗硅,理论上需要二氧化硅的质量是多少?

题型:多项选择题

In early autumn I applied for applied for admission to college. I wanted to go nowhere but to Cornell University,but my mother fought strongly againsnst it. When she saw me studying a photograph of my father on the sports ground of Cornell,she tore it up.

“You can’t say it’s not a great university,just because Papa went there.”

“That’s not it at all.And it is a top university.”She was still holding the pieces in her hand. “But we can’t afford to send you to college.”

“I wouldn’t dream of asking you for money.Do you want me to get a job to help suppont you and Papa?Things aren’t that bad,are they?”

“No,”she said. “I don’t expect you to help support us.”

Father borrowed money form his rich cousins to start a small jewellery shop,His chief customers were his old college friends.To get new customers,my mother had to help.She picked up a long-forgotten membership in the local league of women,so that she cound get to know more people. Whether those people would turn into customers was another question. I knew that my Parents had to wait for quite a long time before their small investment (投资) could show returns.What’s more ,they had not wanted enough to be roch and successful ;otherwise they cound not possibly have managed their lives so badly.

I was torn between the desave to help them and change,their lives,and the determinstion not to repeat their mistakes.I had a strong belief in my power to go what I wanted.After months of hard study I won a full college scholarship(奖学金).My father could hardly contain his pride in me,and my mother eventually gave in before my success.

小题1:The author was not allowed to go to Cornell University mainly because

his father grduated from the university

his mother did not thinks it a great university

his parents needed him to help support the family

his parents did not have enough money for him

小题2:The father srarted his small shop with the money from         

A.a local league

B.his university

C.his relatives

D.his college friends小题3:Why did the mother renew her membership in the league?      

A.To help with her husband’s business

B.To raise money for her son

C.To meet her long-forgotten friends

D.To better manage her life小题4:According to the text,what was the author determined to do in that autumn?  To get a well-paid job for himself

To improve relations with his mother

To go to his dream university

To carry on with his father’s business

题型:多项选择题

实行宗教信仰自由政策,不是真正符合人民利益的唯一正确的政策。()

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