在Excel中，“查找和替换”对话框中，要从“查找”切换到“替换”应该用（）A.Sh

阅读理解。

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

  is also known as kite boarding, and in some European countries as fly surfing. Kite surfing 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

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

A. Water  

B. Wind  

C. The sun

3. Which is the following is wrong ?

A. Kite surfing is too expensive to get the epuipment .

B. Kite surfing is becoming much safer because of the development of it's equipment progress

C. Kite surfing is easy to learn , compared with other water sports .

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

5. The main idea of this passage is about _____.

A. the way of operating kitesurfing    

B. the progress of kite surfing equipment?

C. the development of kitesurfing

ABO血型系统中的A型血是指（）

A.红细胞表面有A抗原

B.白细胞表面有A抗原

C.血小板表面有A抗原

D.血清中有A抗原

E.血清中有抗A抗体

危险点分析预控工作的根本目的是（）

有一位无产阶级革命家写了一首诗《在长沙》：

陈家山辟接蓉园，异室同型九所连。

硕速化为千广厦，九州男妇尽欢颜。

这位革命家是谁？

通过（）来保证列车运行安全，使同方向列车不致发生追尾冲突，对向列车不致发生迎面相撞。

A.连锁设备

B.闭塞设备

C.电气设备