牙周病免疫中B细胞产生的最重要的抗体是（） A．IgA B．sIgA C．IgG D

补全对话（共5小题，每小题2分，满分10分）

根据语境，用恰当的语言完成对话。

（Happy is talking with his classmate, Cheng Cheng, on the hallway.）

Happy=H                 Cheng Cheng=C

C: Happy, summer vacation is coming soon. How happy!小题1:______________________?

H: I’ve no idea. Maybe I’m traveling with my classmates.

C: But do your parents allow you to travel by yourselves?

H: I’m not sure. But I think teenagers should be allowed to make their own decisions.

C: 小题2:______________________________. We are old enough to take care of ourselves.

H: That’s right. 小题3:______________________________________________ ?

C: Sorry, I’m afraid I can’t go with you. I’m planning to join an English language club.

H: Wow, why do you work so hard? Your English is good.

C: 小题4:______________. But not good enough. I always dream about studying aboard (往国外) one day.

H: That sounds good. 小题5:____________________________________________?

C: It’s certain that I’d like to go to an English-speaking country. But I don’t know which one exactly right now.

H: You’re great. I think you can make your dream come true.

下颌前伸关系记录的目的是（）

A.确定切道斜度

B.确定前伸髁道斜度

C.确定侧方髁道斜度

D.确定上下颌间的距离

E.使上下堤均匀地接触

1953—1970年，日本的“水俣病”产生的原因是(    )

A．汞污染

B．食物中毒

C．海水富营养化

D．镉污染

With the theme "Cherishing the earth's resources, transforming the mode of development and living a low-carbon lifestyle," China's Ministry of Land and Resources held a ceremony this Thursday to mark the 41st World Earth Day, aims to generate new ideas of resource-saving, especially among the younger generation. In fact, Chinese young urbanities are turning to the seemingly trendy low-carbon lifestyle.

But for the country as a whole to achieve a low-carbon economy, it could mean ordinary people paying more for electricity, water, gas or simply every purchase. Of necessity, a low-carbon economy would be the basis of China's economic growth, yet it comes with a high price tag. Everybody longs for fresh air, clean water and healthy surroundings. But, who is going to pay for that?

For those who are still working hard for the basic necessities of life, sharing the cost of a greener environment can be taxing. For those who are already victimized by environmental pollution, additional expenditure for saving the environment is hard to bear. Behind all the lofty goals and loaded phrases of climate change negotiations, in everyday terms, the Chinese want to know whether companies will make them pay the cost of saving energy or whether government would come up with new levies.

They have reasons to worry. The recent hike in the charges of utilities, such as natural gas, water and electricity, have led to widespread public grievance(抱怨,牢骚), for the increases were imposed without proper public hearing. Besides the practice of monopoly State-owned enterprises raising prices at will does not seem to bode well for a low-carbon economy.

The government has a responsibility to strengthen regulation of utility charges and make the pricing mechanism more transparent. In the age of the low-carbon economy, the Chinese government needs to strike a new balance between public welfare and business competitiveness.

How far the initiatives toward a low-carbon economy succeed depends on whether they truly benefit ordinary people and is accepted by them. The majority cannot sacrifice their life to build a greener world for the few.

64.The author probably agrees to call on ____________.

A. more and more citizens to devote themselves to the “Low-carbon economy” for the sake of

our earth immediately

B. the rich to generally pay for the bill, which aims at saving our planet.

C. our government to take proper measures to make the “Low-carbon economy” benefit more

people

D. all the big enterprises to reduce their prices to build a greener world

65. According to the passage, which of the following statements is NOT TRUE?

A. Some people can’t afford their everyday expenses, let alone pay for a better environment.

B. Putting forward the “Low-carbon economy” costs much.

C. The balance between public welfare and business competitiveness in China now is not that

good for the “Low-carbon economy”.

D. Now that it’s hard for us to make the “Low-carbon economy” into practice, our government

should put it to an end.

66. The “Low-carbon economy” __________.

A. is beneficial only to the rich people

B. has led to widespread public grievance

C. can be realized when pigs fly in the sky

D. cannot be called success before it has been fully considered

67. What’s the best title of the passage?

A. China reaches out for younger generation to promote low-carbon lifestyle.

B. Low-carbon economy, acceptable or not?

C. Who will get the most benefit from the Low-carbon economy?

D. Put forward the new policy and save the world.

男，56岁，心肌梗死后2天，心电图示完全右束支传导阻滞，频发室早，上述哪种药物最适宜？（）

A.利多卡因

B.维拉帕米

C.硝普钠

D.阿替洛尔

E.普罗帕酮