问题 单项选择题

过去,大多数航空公司都尽量减轻飞机的重量,从而达到节省燃油的目的。那时最安全的飞机座椅是非常重的,因此只安装很少的这类座椅。今年,最安全的座椅卖得最好。这非常明显地证明,现在的航空公司在安全和省油这两方面更倾向重视安全了。
以下哪项如果为真,能够最有力地削弱上述结论

A.去年销售量最大的飞机座椅并不是最安全的座椅。

B.所有航空公司总是宣称他们比其他公司更加重视安全。

C.与安全座椅销售不好的那些年比,今年的油价有所提高。

D.由于技术创新,今年最安全的座椅反而比一般座椅的重量轻。

答案

参考答案:D

解析: 题干的论证必须基于一个假设,即今年出售的最安全的座椅,仍然同过去一样,由于比一般座椅重而导致较多的耗油量。否则的话,就没有理由认为今年最安全的座椅卖得最好,所以由此得出结论:现在的航空公司在安全和省油这两方面更倾向于重视安全。D项断定这一假设不能成立,因此有力地削弱了题干的结论。其余各项均没有削弱,并且事实上支持了题干的论证。

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                           Free Activities This Weekend
Fall Fashion Show
     Golden Shopping Plaza.Sunday 3: 00 P.M. Men's and
women's fan clothes. See 25 fabulous models wearing the
latest fashions. All clothing on sale after the show for under
$ l00.
Rock Concert at University Park
     Saturday from 9:00 P. M. to midnight come to hear some
great music. Five terrific student bands are going to play. Bring
your own food and drink.
Library Lecture
     City Library Auditorium Saturday at 10:00 P.M. How to find
the job you really want! Two hour Lecture. Advice on choosing
and getting the night job, for you. Sandwiches and soda
City Museum Travel Movies
     Saturday and Sunday at 2:30 P. M. Do you want to travel,
but don't have enough money? See movies on Japan. Indonesia.
Brazil. Italy, and Australia. There are only 100 seats, so come
early.
1. You can go to Golden Shopping Plaza to enjoy the fall fashion show __________.
A. on Saturday
B. on Sunday
C. on Saturday and Sunday
D. at 10:00 A. M.
2,  There will be __________ at 10:00 A. M. on Saturday.

A. a fashion show
B. a lecture
C. a travel movie
D. a rock concert

3. __________ are going to play for the rock concert at the University Park on Saturday.
A. 25 fabulous models
B. Travelers
C. Five terrific student bands
D. Workers
4. You can enjoy __________ at 2:30 P.M. on Saturday and Sunday.
A. fall clothes
B. movie tickets
C. sand wiches and soda
D. rock music
5. The lecture on Saturday will last __________ and you will get some useful advice.
A. 2 days
B. 2 hours
C. one day
D. one hour
判断题