问题 单项选择题

病毒可通过以下哪种途径在体内传播

A.胎盘或产道传播

B.沿神经传播

C.虫媒传播

D.水平传播

E.消化道传播

答案

参考答案:B

解析:病毒在体内的传播途径有:经血液传播,沿神经传播。病毒通过胎盘或产道由亲代传播给子代的传播方式称为垂直传播。虫媒传播、水平传播和消化道传播是病毒在人群个体间的传播方式。故选择项A、C、D和E均为错误的。

阅读理解

阅读理解。

       Ask any student which subject he or she hates most. 9 out of 10 students will answer "math". No

  matter which country you visit, no matter which grade you are in, you may not learn art, geography,

  chemistry or Chinese, but you always learn math. Why is this so? How come so many students hate math,

   and yet cannot avoid learning it in school?

       Jenny Sanders, a high school student in California, asks, "What good do we get from learning math? 

   We can use computers to compute numbers, and we can use computers to store information. I think

  learning math at school is a waste of time."

       However, there is much more to math than just learning to add and subtract (减) numbers. In fact,

  math is not so much about calculation (计算) as it is about learning to think logically (逻辑地) and solving

  problems. Of course, Jenny was right that we can use computers to do calculations, but how would we

  even know how to use the computer if we can't think logically? In short, computers are only tools when

  solving problems.

       For example, imagine you are a cook and must serve dinner to 100 guests. How should you divide

  your resources so that you can get the job done most efficiently (高效地)? In situations like this, the

  ability to think logically will get you to a reasonable answer and solve your problem.

根据材料内容选择最佳答案,并将其标号填入题前括号内。                 

1. According to the passage, which subject do students always learn in different grades at school?

A. Chinese.        

B. Math.          

C. Geography.        

D. Art.

2. What does Jenny Sanders think of learning math?

A. Interesting.      

B. Boring.        

C. Useless.          

D. Difficult.

3. Which of the following is TURE according to the passage?

A. 90﹪of the students hate learning math.

B. Students can learn math well with computers.

C. Math can do calculations and store information.

D. Math helps students learn all the other subjects well.

4. What does the underlined word "resources" mean in the passage?

A. 科目          

B. 效率            

C. 信息          

D. 资源

5. What does the writer want to tell us?

A. Math is just learning to add and subtract numbers.

B. Math can be good for both our body and our mind.

C. Math helps us think logically and solve problems.

D. Math can help students find a good job in the future.

填空题