下列实验操作错误的是( ) A. 加入固体粉末 B. 读取液体体积 C.

题型:选择题

问题:

下列实验操作错误的是(  )

A.

加入固体粉末

B.

读取液体体积

C.

加热液体物质

D.

倾倒液体物质

考点:化学实验操作的注意事项
题型:选择题

周末,小明去麦当劳,发现A类套餐每份18元,B类套餐每份21元,他带了60元,买3份,有几种买法?

题型:选择题

实验法的优点是什么?教师在运用实验法时应注意哪些方面?

题型:选择题

阅读理解

     Born on February 9,  1954 in Milwaukee,  Wisconsin, Christopher Gardner never know his father.

He lived with his mother, Bettye Jean Gardner, whom he adored, and, when necessary, in fosterhomes

(寄养家庭). Despite a life of hardship, his mother provided him with strong "spiritual genes" and taught

him some of the greatest lessons of his life, which he follows to this day.

    She convinced him that in spite of where he came from, he could attain whatever goals he set for

himself by saying, "If you want to, one day you could make a million dollars." Gardner believed this to

be fact, and knew he would have to find a career he could be passionate (热情的) about, one that

would allow him to "be worldclass".

    Though he was hardworking and determined, a series of circumstances in the early 1980's left him

homeless in San Francisco and the single guardian of his 2yearold son.  He was unwilling to give up his

son and his dream of financial independence. Though without connections or a college degree, he still

somehow earned a spot in a stockbroker (股票经纪人) training program. Often spending his nights in

a church shelter or the bathroom at a train station in Oakland, Gardner ended up the only trainee offered

a job at Dean Witter Reynolds in 1981.

    Today, he's the CEO of Christopher Gardner International Holdings, a company he founded with

offices in New York, Chicago, and San Francisco. The amazing story of his life was published as an

autobiography, The Pursuit of Happiness, and is the inspiration (灵感,启示) for the movie of the same

name starring Will Smith.

1. The underlined word "one" in the second paragraph refers     to   ________.

   A. the place where he lived

   B. the goal he set for himself

   C. the fact to make a million dollars

   D. his future career

2. From the third paragraph we can learn that ________.

   A. hardworking and determined people can also be defeated by bad luck

   B. Gardner did finish his stockbroker training program

   C. Gardner had to make a choice between his dream and  his beloved son

   D. it is impossible for one without a college degree to get a  job as a stockbroker

3. Gardner's story can be best described as ________.

   A. a ragstoriches story

   B. an orphantomillionaire story

   C. a CEOtostar story

   D. a failuretosuccess story

题型:选择题

禁止生产经营下列食品()。

A、营养成分不符合食品安全标准的专供婴幼儿和其他特定人群的主辅食品。

B、超过保质期的食品。

C、有标签的合格预包装食品。

D、国家为防病等特殊需要明令禁止生产经营的食品

题型:选择题

直流电动机的调速方法有调压调速、串电阻调速和()三种。

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