问题 单项选择题 A1/A2型题

以下对小儿神经母细胞瘤的描述,正确的为()

A.80%发生于3岁以下的幼儿

B.最常见的转移部位为骨骼、淋巴结和肝脏

C.表现为肾上腺区或腹膜后不规则形密度不均匀的实性肿块

D.肿块内常见斑点状钙化

E.以上均正确

答案

参考答案:E

解析:神经母细胞瘤是小儿最常见的颅外实性恶性肿瘤,约80%发生于3岁以下,最常转移至骨骼、淋巴结和肝脏。神经母细胞瘤多呈不规则实性软组织肿块,瘤内可有坏死、出血和钙化,无钙化神经母细胞瘤如侵犯肾脏,难以与肾母细胞瘤鉴别。

阅读理解

The best way to improve your reading ability is, of course, to read. The student must make a real effort to improve his speed, and if necessary his comprehension, with each exercise. Too many students read passages passively(被动的) and without judgment: they simply start at the first word and read through to the end. You should read a passage actively, selectively(选择地) and purposely. You must believe that you indeed have the ability to read faster and understand, and that you will.

Reading, like everything else in life, is best done when you’re relaxed. The key to improve it is concentration. You must be willing to break some old habits and form new ones. Extra body movement, such as turning the head from side to side, pointing at the line with a finger or pencil, or moving the lips, should be stopped immediately. Reading is mostly a mental process(大脑活动过程) and body movement helps neither speed nor comprehension. Then you should see words as part of a whole sentence or paragraph, not just in isolation(孤立), This is why a slow, word-by-word student often understands far less, or misses much of the joy and excitement of reading.

The student must learn to improve reading skills on their own, and not just when a teacher is looking over his shoulder. Reading improvement takes discipline(纪律) and effort. Don’t give up.

1. According to the author, how should we not read a passage?

A. actively        B passively.   C. purposely        D. selectively

2. You may conclude that whether you can improve your reading depends on________.

A. your attitude                      B. your good habits of reading

C. discipline                         D. all of the above

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

A. When reading, you’d better point at the line with a pencil.   

B. When reading, you should turn your head from side to side.

C. When reading, you should pay attention to basic unit of meaning, that is a phrase or sentence that contains an idea.    

D. Body movement will help you to improve reading.

4. The best title for this passage is___________.

A. Reading Faster                         B. Understanding Better

C. How to Improve Your Reading             D. Don’t Give Up

单项选择题