问题 单项选择题

研究表明,很少服用抗生素的人比经常服用抗生素的人有更强的免疫系统。然而并无证据表明服用抗生素会削弱免疫系统。 如果正确,以下哪项最好地调和了以上信息中明显的分歧

A.免疫力强的人很少被传染上人们通常用抗生素治疗的疾病。

B.免疫力很强的人很少意识到他们的免疫力很强这一事实。

C.免疫力很差的人,如果不吃抗生素类药,很难从细菌传染病下恢复过来。

D.尽管抗生素会产生许多副作用,有些人依然使用这类药。

答案

参考答案:A

解析:本题的分歧之处在于没有证据表明吃抗生素会降低人体免疫功能,然而不吃抗生素的人的免疫系统比吃抗生素的人的免疫系统的功能更强。A选项指出免疫力强的人很少感染上人们通常用抗生素治疗的疾病,因而,不是因为少吃抗生素免疫力强,而是因为免疫力强才少吃抗生素,解释了本题段落中的分歧,为正确答案。B项、D项为无关选项, C项指出免疫力差会导致染病时使用抗生素,但是不排斥免疫力强的也使用,排除。

多项选择题
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(B)

Mr. and Mrs. Smith always spent their summer holidays in New Jersey in the past , staying in a small inn at the foot of a hill . One year , however Mr. Smith made a lot of money in his business , so they decided to go to London and stay at a really good hotel while they went touring around the famous city .

They flew to London and arrived at their hotel late one evening . They expected that they would have to go to bed hungry , because in that small inn in New Jersey , no meals were served after seven . They were therefore surprised when the man who received them in the hall asked whether they would take dinner there that night .

“ Are you still serving dinner ? ” asked Mr. Smith .“ Yes , certainly , sir , ” answered the man . “ We serve it until half past nine . ”“ What are the times of meals then ? ” asked Mr. Smith .“ Well , sir ” answered the man , “ we serve breakfast from seven to half past eleven in the morning , lunch from twelve to three in the afternoon , tea from four to five , and dinner from six to half past nine . ”“ But that hardly leaves any time for us to see the sights of London , ” said Mrs. Smith .

26. Mr. and Mrs. Smith in the past______________ .

A. has often stayed in a big hotel in New Jersey

B. had travelled to many places

C. often stayed in a small inn

D. had made a lot of money

27. They decided to go to a really good hotel because____________ .

A. it was famous

B. it was difficult to find a cheap hotel

C. it was near many interesting places

D. they now had enough money

28. When they arrived at the hotel , they found___________ .

A. no meals were served after seven

B. dinner was still being served

C. their plane had arrived too late

D. they had to go to bed hungry

29. When the man told them the times of meals at the hotel , Mrs. Smith felt_______ .

A. disappointed   B. excited   C. delighted   D. satisfied

30. Mrs. Smith_____________ .

A. thought she would have plenty of time to see the sights

B. was afraid they would have no time to tour around London

C. thought the hotel was not as good as the small inn

D. thought the hotel was much better than the small inn for its good meals