金融衍生品包括( )。A．远期 B．期货 C．期权 D．互换 E．外汇

阅读理解。

     Football is one of the most popular, interesting and exciting games. Football is popular among tens of

millions of people all over the world.

     I am a football fan. I began to watch football games when the league football match first took place in

China. Then, I became interested in football. In the match, I enjoy the wonderful goal shootings and the

players' courage and endurance (勇气和耐力). The most interesting thing is the result which anyone

can hardly tell.

     The world cup is held every four years. It draws a lot of interest of people all over the world when

teams from different countries begin to fight for the world cup. In the match, many football fans make

friends with one another and know different things of other countries. So football match isn't a simple

match. It's an exchange of culture.

     It is good to support your favourite football team on the sport. To support our national team to fight

for the world cup is the hope of all the Chinese football fans.

1.The writer became interested in the football when the league match was first held _____. [ ]

A. in the United States

B. in Brazil

C. in China

D. in a place not mentioned

2.According to the passage, football is interesting and exciting because of _____. [ ]

A. the wonderful goal shootings

B. an unexpected result

C. the players' courage and endurance

D. all the above

3.The world cup is held _____. [ ]

A. every four years

B. every year

C. every three years

D. every six years

4.What is the writer's point of view about the football match? [ ]

A. A simple match

B. An exchange of culture

C. A match fighting for the world cup

D. I've no idea. 

5. As a Chinese, what do you do during the match of the world cup? [ ]

A. To join the football team.

B. To support the national team to fight for the world cup.

C. To be a football fan like the writer

D. To become a referee (裁判)

如图所示，理想变压器原、副线圈的匝数比为10：1，b是原线圈的中心抽头，电压表和电流表均为理想电表，从某时刻开始在原线圈c，d两端加上交变电压，其瞬时值表达式为当单刀双掷开关与a连接时，下列判断正确的是

A．电压表V₂的示数为22 V

B．当s时，电压表V₁的示数为220 V

C．在滑动变阻器触头P向上移动的过程中，电压表V₂示数增大，电流表示数变小

D．若将单刀双掷开关由a扳向b，电压表V₂和电流表的示数均变小

DNA倍体分析需借助()

A．荧光显微镜

B．流式细胞仪

C．显微分光光度计

D．倒置显微镜

E．图像分析仪

某高层住宅发生重大火灾。下列逃生措施①沿楼梯迅速上移②用湿毛巾堵住口鼻③匍匐前进，寻找安全出口④封闭房门⑤迅速转移到阳台等待救援⑥跳楼，其中正确的选项是

A．②③④⑤

B．①②③④

C．③④⑤⑥

D．①②④⑤

泵抽空时，泵的入口流量增大，出口流量下降。