问题 单项选择题

以下说法错误的是()

A.遗传是引起过敏反应的一个重要因素

B.过敏原暴露是发生食物过敏的先决条件

C.婴幼儿对多种抗原敏感的原因可能是肠道分泌的分泌型IgG较少

D.食物过敏原与其他抗原的作用效果是相加的

E.婴幼儿对多种抗原敏感的原因是肠道功能不成熟

答案

参考答案:C

解析:分泌型IgA的作用是保护肠上皮组织,使细菌、病毒及抗原等大分子不易粘附在肠黏膜表面,从而防止它们的吸收。当分泌型IgA缺乏时,抗原就可能大量侵入机体。婴幼儿对多种抗原敏感的原因可能是肠道分泌的分泌型IgA较少。

选择题
阅读理解

阅读理解。

     When the six very best students from different cities in Guangdong Province all together chose universities

in Hong Kong; when the very best students of Beijing picked up HK University while giving up the nearby Beijing

or Qinghua University; when the highest enrollment (录取) rate of Hong Kong Science and Industry University

reached 48:1, it's the high time to ask where the real education heaven for students in China is.

     Years ago, the answer certainly would be"Beijing or Qinghua University". But now no one could give the

exact reaction without hesitation. The only sure thing is that HK universities have gradually showed an unusual

attraction to a great many mainland students.

     It's no doubt to call this HK craze (狂热), which is even out of the expectation of those HK universities them

selves.

     How can HK universities shake the steady foundations of Beijing and Qinghua and attract so many mainland

students?

     First, Hong Kong universities offer large-amount scholarship, especially for the top students who can receive

the sum scholarship as much as 400,000 HK dollars. Since higher education has become a kind of heavy burden

of many families, it's easy to understand why the reaction to the generous offering of HK universities is great.

     Second, most HK universities receive professors and students from all over the world and carry out bilingual

(双语) education. This kind of excellent language atmosphere is another attraction for mainland students.

     Furthermore, university students in Hong Kong have a better chance to study abroad as exchange students. 

     Can mainland top universities like Beijing or Qinghua University be calm as before when facing the

unexpected competition from HK? Will they take relevant measures to win back the top students who once help

them set the worldwide reputation? Time will explain it.

     The fierce competition brought by HK universities can be a good thing for an entire improvement of

education in China. After the awakening and action-taking of mainland universities, they can perform better

together with HK universities.

     At least, it reminded the mainland universities the tuition fees (学费) are among students' top concern when

they are choosing universities. It's time to move.

1. What is the passage mainly talking about? [ ]

A. Some thoughts brought by the enrollment of HK universities.

B. Higher education in Hong Kong.

C. The competition between HK University and Beijing University.

D. The fall of mainland universities.

2. Top students from mainland apply for HK universities because ______. [ ]

A. many students now would love to study abroad to get a better experience

B. they concern only about the tuition fees when choosing universities

C. HK Universities offer higher scholarship, better environment and more opportunities for their further study

D. Beijing University has lost its worldwide reputation

3. What is the author's attitude toward the competition brought by HK universities? [ ]

A. The government should take relevant measures to stop this unfair competition.

B. Mainland universities had better lower their tuition fees and win back the top students.

C. Universities both in mainland and in HK would get an entire improvement during the competition.

D. It may probably cause a complete loss to both sides in the end.

4. From the passage we can see HK universities ______. [ ]

A. didn't mean to enroll top students from mainland

B. didn't expect their enrollment of mainland students would be so popular

C. have strict enrollment rules and only 1out of 48 students can get the chance to study there

D. are proud of their teaching staff and facilities