()是描述纸张表面状态的物理量。A、表面强度 B、表面张力 C、表面过剩 D、表面引

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问题:

()是描述纸张表面状态的物理量。

A、表面强度

B、表面张力

C、表面过剩

D、表面引力

考点:平板印刷工考试印刷技术印刷技术题库
题型:多项选择题

阅读选择最佳选项。

    China's Zhou Yang won the Olympic Games women's l 500-metre short-track gold on Saturday. 

    "I told myself a few days ago' Zhou Yang, you can do this',"the 18-year-old olympic newcomer said.

"I believed in myself."

    "This gold medal will change things. It will give me more confidence. It will give my mum a better

lifestyle."    

     China's Shen Xue, aged 31, and Zhao Hongbo, aged 36, celebrated St. Valentine's Day and the Chinese

New Year by winning a gold medal in the pairs figure skating at the Vancouver Olympics on Sunday. "We

have not competed(比赛)much in the last two years and we came back to compete at the Olympic Games

as it is our dream to win an Olympic gold medal."

    China's Wang Meng won again her Olympic women's 500-meter short-track skating title on Wednesday. 

   "I have a lot of confidence.I feel that it's my duty to win that. It's still the Chi- nese New Year holiday," she

 said,"Kowtow(磕头)was the only way to express my thanks to the coaches, team leaders and teammates."

1. How old is the Olympic newcomer, Zhou Yang?

A.18

B.25

C.33

D.36

2. What is Shen Xue and Zhao Hongbo's dream?

A. To celebrate Chinese New Year.

B. To give their parents a better life.

C. To win an Olympic gold medal.

D. To spend a special Valentine's Day.

3. In what sport did Wang Meng win the gold medal?

A. Figure skating.

B. Women's 1500-metre short-track skating.

C. Skiing.

D. Women's 500-metre short-track skating.

4. Where may you probably read this passage?

A. In a story book.

B. In a news report.

C. In a TV play.

D. In an advertisement.

题型:多项选择题

R在氧气中燃烧的化学方程式为:2R+3O2=2CO2+4H2O,则有关R的组成叙述正确的是(  )

A.只含有碳、氢元素

B.一定含有碳、氢元素,可能含有氧元素

C.一定含有碳、氢、氧元素

D.一定含碳、氧元素,可能含有氢元素

题型:多项选择题

“神七”飞船的成功发射是我国航天事业的又一里程碑。请回答下列问题:

(1)过氧化钠在常温下能与人呼出的二氧化碳反应生成碳酸钠和氧气,常用作飞船中的氧气再生剂。该反应的化学方程式为                          。

(2)火箭发射时,常用联氨做燃料,用四氧化二氮做助燃剂,反应的化学方程式可表示为:2N2H4 + N2O4===3N2 + 4X,则X的化学式为                           。

题型:多项选择题

下列元素中,原子半径最小的是 [ ]

A.Si

B.P

C.S

D.Cl

题型:多项选择题

驻车拉丝松紧度调整:手柄处于起始位置,通过拉丝接头螺母来调节松紧度,调整完毕后,在用螺母锁紧,此时驻车制动鼓不应咬死;拉丝的最大工作行程不小于()。

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