婴儿最常见的腹部肿瘤是（） A.肾癌 B.肾错构瘤 C.肾盂癌 D.肾母细胞瘤 E.

南朝的数学家______，得到小数点后七位数的圆周率在 3.1415926和3.1415927之间。这比欧洲数学家计算出同精度的圆周率早了1000多年。

  阅读理解。

   Kitesurfing as a water sport began in the 1980s, but didn't get popular until the end of last century. It is also

known as kiteboarding, and in some European countries as flysurfing. Kitesurfing works through wind power

(动力) by using a large kite to pull a rider on the water at high speed.

At first, kitesurfing was a difficult and dangerous sport. Now it is becoming easier and safer because of the

safer kite design. For an able and strong person, kitesurfing can be a very fun, extremely exciting sport, just

like skating on the water with a feeling of flying. It has become more and more popular.

   Compared with other water sports, kitesurfing is easier to learn. A beginner can understand how to operate

the kite with 5-10 hours of training. And anybody aged from 13 to 65 can learn. It is not expensive to get the

equipment for kitesurfing, which costs $1,000 to $2,500. Training lessons range from $200 to $500 for two

or three hours. With the development of its equipment progress, kitesurfing is becoming even safer. After some

training, you can enjoy its excitement and challenging feeling.

   With the rising popularity of kitesurfing, most major seaside cities have kitesurfing clubs. In China, Xiamen

is the only place that has the kitesurfing club, which provides professional kitesurfing training and equipments.

1. Kitesurfing has a history of about___ years.

A. 30

B. 50

C. 100

D. 130

2. ___is mentioned in the passage as the power of kitesurfing.

A. Water

B. Wind

C. The sun

D. The kite

3. The underlined word "range" in the third paragraph means"___ " in Chinese.

A. 在……范围内变动

B. 按……顺序排列

C. 向……方向延伸

D. 根据……归类

4. The most important reason for the popularity of kitesurfing is that___. 

A. its price is getting lower and lower

B. more and more people are enjoying its excitement

C. its equipment progress makes it easier and safer

D. all people can learn and take part in it

5. The main idea of this passage is about___.

A. the way of operating kitesurfing

B. the progress of kitesurfing equipment

C. the history of kitesurfing in China

D. the development of kitesurfing

治疗糖尿病昏迷应选用（）

A.格列吡嗪

B.胰岛素

C.格列本脲

D.二甲双胍

E.阿卡波糖

建立图素厚度的命令是（）。

A.ELEV

B.THICKNESS

C.CHANGE

D.PROPERTIES

骨髓增生性疾病包括下列哪些疾病（）

A.真性红细胞增多症

B.原发性血板增多症

C.骨髓纤维化

D.骨髓增生异常综合征

E.CML