“对于欧洲或北美一个或数个缔约国的武装进攻，应视为对缔约国全体之攻击，”你认为此

民主的质量，不光取决于民众是否有权利对社会重大问题发表意见，而且取决于民众是否有能力对社会重大问题发表有理有据的意见。随着科学技术的发展，社会重大问题的专业含量、理论含量和技术含量越来越高，普通民众越来越难以对重大社会问题，例如，三峡工程是否应当上马，如何有效控制房价等等，发表内行意见。
以下哪项是上述断定的逻辑推论

A．专家应当承担对普通民众进行专业教育的责任
B．科学技术的发展威胁到民主的质量
C．普通民众有责任提高自己的科学技术素养
D．非重大社会问题都不涉及专业问题
E．只要民众有能力对社会重大问题发表有理有据的意见，民主的质量就能确保

阅读理解。

    Betty is an American school girl. She is very happy because her parents will take her to China for a visit. They are going to fly from New York on June 30 and get to Beijing on July 1. They will stay at Lido Holiday Inn. Their Chinese friends will show them around Beijing. They are going to visit the Palace Museum, the Summer Palace, the Temple of Heaven and the Great Wall. They will also visit some Chinese homes and try some Chinese food. They will spend a week in Beijing and then go to Xi’an, Guilin and some other places for sightseeing. The whole trip will take three weeks and she is sure she will have a great time in China.

1. Betty is very happy because she will _______ with her parents.

A. visit China

B. go home

C. watch TV  

D. go back to New York

2. Their _______ friends will show them around Beijing.  

A. Australian

B. Chinese

C. American    

D. Canadian

3. From the text we can know that they will _______ in Beijing.      

A. go to some places for sightseeing   

B. learn to speak Chinese 

C. try some Chinese food              

D. both A and C

4. After they visit Beijing , they will go to _______ .

A. Xi’an and Guilin

B. The Summer Palace  

C. Shanghai          

D. Thailand

5. How long will the whole trip take?

A. one week

B. two weeks

C. three weeks    

D. four weeks

车站按其站台形式可分为岛式车站、侧式车站、（）、一岛两侧等车站形式。

下列生产过程中的危害因素，属于化学因素的是（）。

A.真菌

B.病毒

C.工业毒物

D.辐射