问题 选择题

我国婚姻法明确规定“禁止近亲结婚”,下列说法正确的是               (     )

A.近亲结婚后代一定会患上遗传病

B.近亲结婚后代的成活率低

C.近亲之间携带相同致病基因的可能性比较大

D.这里的近亲是指直系血亲和三代以内旁系血亲

答案

CD

题目分析:近亲是指的是直系血亲和三代以内的旁系血亲.我国婚姻法已明确规定,禁止直系血亲和三代以内的旁系血亲结婚.这是为什么呢?原因是近亲带有相同隐性遗传致病基因的可能性较大,近亲结婚所生的孩子患有遗传病的可能性较大,如近亲结婚时所生的子女中,单基因隐性遗传病的发病率比非近亲结婚要高出7.8~62.5倍;先天畸形及死产的机率比一般群体要高3~4倍.孩子智力下降,并患有许多先天性疾病如先天愚型,其危害十分显著.

阅读理解

阅读理解。

     No one wants to look stupid or do the wrong thing at a new job. It is important to make the right

impression from the very first day. You will face new people. You will be in a new place.

     It may be difficult to know what to do. Here are five tips to help you make it through the first days at

a new job:

     1. First impressions can last forever. Make sure you make a good one. Before your first day, find out

if your new job has a dress code (rules about what you can wear to work). If so, be sure to follow it.

No matter what, always be neat and clean.

     2. Get to work on time. Give yourself an extra15 minutes to make sure you arrive on time.

3. Pay attention to introductions. One of the first things that your supervisor may do is to introduce you to

co-workers. These co-workers will be important to you. They are the ones who will answer your

questions when the boss is not around.

     4. Ask plenty of questions. Make sure that your supervisor has told you what is expected of you. If

he or she has not told you your duties, ask for a list. Set daily and weekly goals for yourself.

     5. Never be the first one to leave. Observe(观察) what your co-workers do around quitting time

(下班时间). It does not look good for you to be eager to leave.

1. Before you arrive at work on the first day, you should __________.

A. dress in a right way      

B. introduce yourself

C. know your duties          

D. know your co-workers well

2. According to the passage, which of the following statements is TRUE?

A. You should be the first one to arrive at work.

B. You should ask your co-workers about your duties.

C. You should not be eager to go back home after work.

D. You are required to arrive 15 minutes earlier.

3. According to the passage, your supervisor is most likely your _____________.

A. visitor

B. teacher     

C. workmate

D. leader

4. What is the best title for this passage?

A. Getting a New Job.        

B. Tips on How to Work.

C. The First-day Work.      

D. The Importance of Co-workers.

选择题