问题 选择题

核反应堆通常使用235U和239Pu作为原料,研究和开发核能可以减少对化石燃料的依赖。下列有关说法正确的是

A.239Pu比235U原子核内多4个中子

B.核反应堆中使用的重水与水互为同位素

C.石油、天然气等化石燃料属于可再生能源

D.合理使用核能可有效减少温室气体的排放

答案

答案:D

题目分析:A项239Pu比235U的质子数不等,其原子核内中子数相差不等于4,错误;B项重水与水均为水分子,不是同位素关系,错误;C项石油、天然气等化石燃料不属于可再生能源,错误。

阅读理解

Ellis Island is located in New York Harbor. Ellis Island is open daily year-round from 9:30am to 5:00pm, with extended hours during summer. It is closed on December 25. There is no admission charge to Ellis Island; donations are gratefully accepted.

At Your Fingertips

Park information      (212) 363- 7620

Emergencies         (212 ) 363- 3260

Ferryboat information  (212) 269- 5755

Lost and found       (212) 344- 7620

Dining, gifts, & audio tour  (212) 344- 0996

Transportation

Statue of Liberty and Ellis Island Ferry: Boats leave from Battery Park, Manhattan, and from Liberty State Park, New Jersey. They run about every 30 to 45 minutes beginning at 9: 15 am(ferry schedule subject to change).

Hours: May vary; call the number below

Closed: December 25

Ferry fees (Includes Liberty and Ellis Islands): adults, $ 7; senior citizens, $6; children(age 3 to 17), $ 3. (lower group rates are available for 25 or more adults)

Ticket & schedule information: (212) 269- 5755

小题1: In summer, visitors will have ___________ to visit Ellis Island.

A.no enough money

B.a longer time

C.a shorter time

D.a wonderful time小题2:Which number would you call if your friends were suddenly ill?

A.(212) 344- 0996

B.(212) 363- 7620

C.(212 ) 363- 3260

D.(212) 269- 5755小题3: Which of the following is NOT true?

A.People can visit Ellis Island free of charge.

B.The boats departure time from Battery Park is at 9:15 a.m. all the year round.

C.Ferry fees for children are cheaper than for adults.

D.Ferry fees for group visitors can be reduced.小题4: We may infer from the passage that _____________.

A.visitors prefer to go to Ellis Island by boat

B.there are more visitors in winter

C.Ellis Island is open every day

D.Boat is the only transportation to Ellis Island

单项选择题