易释放氰化物是指在pH=8的介质中,在硝酸锌存在下,加热蒸馏能形成氰化氢的氰化物。

题型:判断题

问题:

易释放氰化物是指在pH=8的介质中,在硝酸锌存在下,加热蒸馏能形成氰化氢的氰化物。

考点:环境监测上岗考试氰化物氰化物题库
题型:判断题

阅读理解。

     My 10-year-old Donna said, "Mom, I made a new friend at school today. Can she come over

tomorrow?" Donna was a shy girl and I wanted her to make some friends to bring her out of her shell.

     "Sure, honey, that sounds great." I said, thinking back to my own best friend, Lillian. We lived across

the street from each other in Washington Heights, New York. We met at the age of 10, too. Like my

daughter, I was shy, but Lillian drew me out. She was one of the friendliest people in school, with shiny

black hair and a mile-wide smile.

    In senior high school, Lillian went on a trip to Florida. This was the first time we had to be away

from each other for a few days. "I'll be back soon." she told me. But three days later, Lillian's sister

told me that she had fallen into a river and hadn't come out any more. Soon, my family moved to New

Jersey. Whenever I thought of her, tears came into my eyes.

    The next day Donna brought her new friend home. "Hi, Mrs. Loggia." the little girl said. Her hair was

so shiny and black and she shot me a big smile. "My name is Laura."

    My daughter's new friend was so much like Lillian. I was still puzzled (迷惑) when Laura's mom

came to pick her up later that afternoon. I opened the door to let her in. "Judy!" she cried. "It's me,

Lillian's sister, from Washington Heights." Yes, my daughter's friend looked familiar. She was Lillian's

niece.

1. The underlined words in the first paragraph "to bring her out of her shell" mean ________.

A. to help her become less shy              

B. to help her become smart

C. to help her live happily                  

D. to help her walk out of her house

2. Laura looked familiar to the writer because she ________.

A. was Lillian's niece

B. was as old as her daughter      

C. was from Washington Heights          

D. had shiny black hair and a big smile, too

3. Why did the writer lose her best friend?   Because ________.

A. she moved to New Jersey    

B. they were different from each other

C. her best friend travelled to Florida

D. her best friend lost her life on a trip

4. "I knew we would be best friends forever." is a sentence from the passage and should be

put at the end of ________

A. Paragraph 2      

B. Paragraph 3        

C. Paragraph 4      

D. Paragraph 5

5. We can infer (推断) from the passage that ________

A. Laura is outgoing

B. Laura helps Donna a lot

C. Laura and Donna are of the same age

D. Judy moved to New Jersey because of Lillian's death

题型:判断题

如图所示,有一小车沿水平面做匀速直线运动,根据图中给出的标度,请用力的图示法画出摩擦力f.

题型:判断题

根据爆炸产生的原因及特征,爆炸现象可分为三类()、()、()。

题型:判断题

患儿8kg,患有代谢性酸中毒,欲将其20Vol%的COcp提高到30Vol%,需要1.4%碳酸氢钠量为()

A.40ml

B.80ml

C.120ml

D.160ml

E.200ml

题型:判断题

(三)资料

某只股票年末每股税后利润为1元,市场利率为16%。

股票交易价格与利率的关系是( )。

A.当市场利率下降时,股票价格下跌

B.当市场利率上升时,股票价格上涨

C.当市场利率下降时,股票价格上涨

D.当市场利率上升时,股票价格下跌

E.市场利率与股票价格负相关

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