问题 单项选择题 A2型题

某地有农产区和旅游区。最近,当地妇幼保健机构对两区产妇及其婴儿体检,发现农产区母亲乳汁和血液中DDT含量高出旅游区1~2倍。进一步调查发现农产区10年前农药的销售量与使用量较旅游区高出3~4倍之多,但近几年来农产区农药销售量、使用量急剧减少,与旅游区相比差异已无统计学上的意义。则两区母乳及血液中DDT值仍差异悬殊的原因最可能是()

A.抽样发生选择性偏倚

B.检测方法有误

C.统计方法有误

D.农产区近期局部有DDT突发性污染

E.DDT的蓄积作用所致

答案

参考答案:E

单项选择题

阅读下列短文:从每题所给的A、B、C、D四个选项中,选出最佳选项,将正确的选项涂在答题卡上。D

Why College Is Not Home

The college years are supposed to be a time for important growth in autonomy(自主性) and the development of adult identity. However, now they are becoming an extended period of adolescence, during which many of today’s students and are not shouldered with adult responsibilities.

For previous generations, college was decisive break from parental control; guidance and support needed help from people of the same age and from within. In the past two decades, however, continued connection with and dependence on family, thanks to cellphones, email and social media, have increased significantly. Some parents go so far as to help with coursework. Instead of promoting the idea of college as a passage from the shelter of the family to autonomy and adult responsibility, universities have given in to the idea that they should provide the same environment as that of the home.

To prepare for increased autonomy and responsibility, college needs to be a time of exploration and experimentation. This process involves “trying on ” new ways of thinking about oneself bothe intellectually(在思维方面) and personally. While we should provide “safe spaces” within colleges, we must also make it safe to express opinions and challenge majority views. Intellectual growth and flexibility are fostered on debate and questioning.

Learning to deal with the social world is equally important. Because a college community(群体) differs from the family, many students will struggle to find a sense of belonging. If students rely on administrators to regulate their social behavior and thinking pattern, they are not facing the challenge of finding an identity within a larger and complex community.

Moreover, the tendency for universities to monitor and shape student behavior runs up against another characteristic of young adults: the response to being controlled by their elders. If acceptable social behavior is too strictly defined(规定) and controlled, the insensitive or aggressive behavior that administrators are seeking to minimize may actually be encouraged.

It is not surprising that young people are likely to burst out, particularly when there are reasons to do so. Our generation once joined hands and stood firm at times of national emergency. What is lacking today is the conflict between adolescent’s desire for autonomy and their understanding of an unsafe world. Therefore, there is the desire for their dorms to be replacement homes and not places to experience intellectual growth.

Every college discussion about community values, social climate and behavior should include recognition of the developmental importance of student autonomy and self-regulation, of the necessary tension between safety and self-discovery.

What’s the author’s attitude toward continued parental guidance to college students?()

A.Sympathetic

B.Disapproving

C.Supportive

D.Neutral

单项选择题