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问题 单项选择题

差动轮系是指自由度（）。

A.为1的周转轮系

B.为2的定轴轮系

C.为2的周转轮系

答案

参考答案：C

阅读理解


Mulan
Zhao Wei plays the role of Mulan who pretends to be a man so that she can fight to protect her country.
Showtime: July 21, 2011
Running time: 115 minutes
Director: Jingle Ma
Stars: Zhao Wei, Aloys
Price: ￥80
Place: Summer Theatre

Lost On Journey
On the way home for the Spring Festival, Xu Zheng traveled with Wang Baoqiang. They changed many vehicles, but they didn’t get home on time at last.
Showtime: July 10, 2011
Running time: 92 minutes
Director:Ye Weimin
Stars: Xu Zheng , Wang Baoqiang
Price: ￥60
Place: Spring Theatre

Bolt
For Superdog, every day is filled with danger.
Showtime: July 25, 2011
Running time: 96 minutes
Director: Chris Williams
Stars: John Travolta
Price: adult￥70;child half price
Place: Summer Theatre

If You Are the One
The film consists of stories between Qin Fen and several ladies.
Showtime: July 30, 2011
Running time: 116 minutes
Director: Feng Xiaogang
Stars: Ge You, Shu Qi
Price: ￥55
Place: Spring Theatre
小题1:How long does the film Mulan last?
A．1 hour and 36 minutes.B．1 hour and 55 minutes.
C．1 hour and 32 minutes.D．1 hour and 56 minutes.
小题2:The film Lost On Journey will be shown on ________.
A．July 30, 2011B．July 25, 2011C．July 21, 2011D．July 10, 2011
小题3:Which of the following is NOT TRUE?
A．Zhao Wei acted Mulan in the film Mulan.
B．The director of Bolt is Chris Williams.
C．Wang Baoqiang and Xu Zheng’s journey was successful.
D．Ge You is an actor in If You Are the One.
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不定项选择题

反应4NH3+5O2=4NO+6H2O，在2L的密闭容器中进行，半分钟后NO的物质的量增加了3.0mol，则此反应的平均速率v（X）为[ ]

A.  v（O2）= 0.1mol·（L·s）-1        

B.  v（NO）= 0.05 mol·（L·s）-1

C.  v（H2O）=0.075 mol·（L·s）-1     

D.  v（NH3）=0.025 mol·（L·s）-1

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