结肠癌出现肠梗阻多表现为（） A.完全性肠梗阻 B.急性肠梗阻 C.慢性不完

At a nation’s saddest moment, its greatest heroes are born.

　　On September 11th, 2001, many police officers and government officials in America worked day and night to save lives from the big fire at the World Trade Centre. And in Japan, after the serious earthquake, a group of workers showed their courage.

　　The earthquake on March 11th made Fukushima Nuclear Power Plant(福岛核电站) turn off and stop its protective cooling systems. And later, a fire broke out.  Workers were told that the plant’s radiation(辐射) could be harmful to human health. Hundreds of workers left the plant quickly. However, a group of workers decided to fight against the fire and the damage, though they knew it could cause very serious health problems. There were 50 workers in all, so they were also named the "Fukushima 50". The workers worked in shifts(轮班).

　　People knew little about the workers, who were mainly experts (专家) with the skills to control the situation. One woman said that her father had volunteered to stay there. “I heard that he volunteered even though he would retire(退休) in just half a year and my eyes were filled with tears. I am really proud of him. And I pray for his safe return.”

小题1:The passage mainly tells us                           .

A．what happened in America on September 1lth, 2001

B．"Fukushima 50" stayed in the nuclear power plant bravely

C．who saved many lives from the big fire at the World Trade Centre

D．what Japanese government did after the nuclear power plant was turned off小题2: Fukushima Nuclear Power Plant was turned off because              .

A．there were no heroes there

B．many workers left the plant

C．it was destroyed by a big fire

D．the earthquake damaged it heavily小题3:       workers stayed in Fukushima Nuclear Power Plant after the earthquake.

A．11

B．50

C．100

D．150小题4: Which of the following is TRUE?

A．The woman was happy to know his father was there.

B．A woman’s father who had retired from work still stayed there.

C．Little was known about the workers when the passage was written.

D．The workers didn’t know staying in the nuclear plant was harmful to their health.小题5: The writer thinks                          .

A．American police officers were very strong

B．the nuclear radiation would do no damage to humans

C．all the workers who stayed in the plant should return quickly

D．all the workers who stayed in the plant are great heroes

三大战役中最能反映人民群众积极支持的是[ ]

A．辽沈战役    

B．淮海战役   

C．平津战役    

D．渡江战役

所谓指令周期是指______。

A．取指令和取操作数的时间

B．执行指令和存储操作结果的时间

C．取操作数和执行指令的时间

D．取指令和执行指令的时间

如图所示，是利用传感器记录的两个物体间的作用力和反作用力的变化图线，根据图线可以得出的结论是（　　）

A．作用力大时，反作用力小

B．作用力和反作用力的方向总是相反的

C．作用力和反作用力是作用在同一个物体上的

D．相互作用的两个物体一定都处于静止状态