Don’t _______ about the exam so much. It

在上题基础上，如药物离子带正电，则分解反应速度

A．增加
B．减少
C．不变
D．不一定
E．几乎不变

阅读理解。

     Parents and kids today dress alike, listen to the same music, and are friends. Is this a good thing?

Sometimes, when Mr. Ballmer and his 16-year-old daughter, Elizabeth, listen to rock music together and talk

about interests both enjoy, such as pop culture, he remembers his more distant relationship with his parents

when he was a teenager.

     "I would never have said to my mom, 'Hey, the new Weezer album is really great. How do you like it?'"

says Ballmer." There was just a complete gap in taste."

     Music was not the only gulf. From clothing and hairstyles to activities and expectations, earlier generations

of parents and children often appeared to move in separate orbits.

     Today, the generation gap has not disappeared, but it is getting narrow in many families. Conversations on

subjects such as sex and drugs would not have taken place a generation ago. Now they are comfortable and

common. And parent-child activities, from shopping to sports, involve a feeling of trust and friendship that can

continue into adulthood.

     No wonder greeting cards today carry the message, "To my mother, my best friend."

     But family experts warn that the new equality can also result in less respect for parents.

     "There's still a lot of strictness and authority on the part of parents out there, but there is a change

happening," says Kerrie, a psychology professor at Lebanon Valley College. "In the middle of that change, there

is a lot of confusion among parents."

     Family researchers offer a variety of reasons for these evolving roles and attitudes. They see the 1960s as

a turning point. Great cultural changes led to more open communication and a more democratic process that

encourages everyone to have a say.

     "My parents were on the 'before' side of that change, but today's parents, the 40-year-olds, were on the 'after' side," explains Mr. Ballmer. "It's not something easily accomplished by parents these days, because life

is more difficult to understand or deal with, but sharing interests does make it more fun to be a parent now."

1. The underlined word "gulf" in Para.3 most probably means _____.

A. interest

B. distance

C. difference

D. separation

2. Which of the following shows that the generation gap is disappearing?

A. Parents help their children develop interests in more activities.

B. Parents put more trust in their children's abilities.

C. Parents and children talk more about sex and drugs.

D. Parents share more interests with their children.

3. The change in today's parent-child relationship is _____.

A. more confusion among parents

B. new equality between parents and children

C. less respect for parents from children

D. more strictness and authority on the part of parents

4. By saying "today's parents, the 40-year-olds, were on the 'after' side", the author means that today's

    parents _____.

A. follow the trend of the change

B. can set a limit to the change

C. fail to take the change seriously

D. have little difficulty adjusting to change

5. The purpose of the passage is to _____.

A. describe the difficulties today's parents have met with

B. discuss the development of the parent-child relationship

C. suggested the ways to handle the parent-child relationship

D. compare today's parent-child relationship with that in the past

物体有保持原来运动状态的性质，称之为惯性，可以看出( )

A．运动速度大的物体比运动速度小的物体难以停下来，所以运动速度大的物体具有较大的惯性

B．物体受的力越大，要它停下来就越困难，所以物体受的推力越大，则惯性越大

C．物体的体积越大，惯性越大

D．物体所含的物质越多，惯性越大

2011年9月29日，我国自主研制的天宫一号目标飞行器在酒泉卫星发射中心发射升空后准确进入预定轨道。11月1日，“神舟八号”发射成功，后与天宫一号自动对接，组成一座小型的低地轨道“空间实验室”。

请用政治生活知识简要说明我国政府大力发展航天事业的原因。

在一绝热刚壁体系内，发生一化学反应，温度从T₁→T₂，压力由p₂→p₁，则（）

A.Q〉0，W〉0，ΔU〉0

B.Q=0，W〈0，ΔU〈0

C.Q=0，W〉0，ΔU〉0

D.Q=0，W=0，ΔU=0