详图是（）。作用是：（）

下列关于双代号网络图的描述中，正确的有( )。

A．双代号网络图中，可以出现循环回路

B．双代号网络图必须正确表达已定的逻辑关系

C．双代号网络图中，严禁出现没有箭头节点或没有箭尾节点的箭线

D．双代号网络图应条理清楚，布局合理

E．绘制网络图时当交叉不可避免时，可用过桥法或指向法

The dream of flying into outer space, cherished by the Chinese people for centuries, will soon come true.

　　China launched its fourth unmanned spacecraft （飞船）“Shenzhou Ⅳ” on December 30 at the Jiuquan Satellite Launch Centre in Gansu Province. It was the 27th consecutive（连续的）and successful launch of China - made rockets since October 1996. This launch has made it more realistic for China to send a person into space on its own following Russia and the USA.

　　Qi Faren，leading designer of the spacecraft system, said all the functions （功能） designed for manned flights have withstood （经受住）the test of three previous, successful launches and return landings of the “Shenzhou” spaceships.

　　China launched the “Shenzhou Ⅰ ”, “Shenzhou Ⅱ ”and “Shenzhou Ⅲ ”spacecrafts in 1999,2001 and 2002 respectively.

　　“Shouzhou Ⅳ” was to make it a more comfortable place in which astronauts can live and work. All parts of the application system for manned flight are aboard the “Shenzhou Ⅳ”craft in all test flights.

　　China’s manned flight programme began in 1992. A number of unmanned test flights will be launched before Chinese astronauts are sent into space.

　　Leading scientists in charge of China’s manned space programme said the successful launch of the “Shenzhou Ⅳ” laid a solid foundation for the country’s future task of sending Chinese astronauts to outer space.

　　The spacecraft returned to the earth on January 5, after completing seven experiments in space.

　　Officials at the centre said that“ Shenzhou Ⅴ”, a manned spacecraft, is expected to be launched later this year.

　小题1:How many countries can send a person into space on its own by now？

A．2.

B．3.

C．4.

D．Not mentioned.　小题2:China’s manned flight programme began in ________.

A．1992

B．October 1996.

C．1999

D．January 2003　小题3:As a matter of fact, ________ .

A．“Shenzhou Ⅴ ”has been launched

B．“Shenzhou Ⅳ” was a manned spacecraft

C．“Shenzhou Ⅲ ”and“ Shenzhou Ⅳ” were not launched in the same year

D．the dream of man flying into outer space has come true in China　　小题4:Which is the most suitable title for the passage?

A．The Successful Launching of “Shenzhou Ⅳ ”.

B．The Landing of “Shenzhou Ⅳ ”.

C．Chin a’s Manned Flight Programme.

D．The Third Country Sending a Person into Outer Space.

色彩的三要素是指（）、（）、（）。

关于结肠癌，下列哪项是错误的（）

A.绝大多数结肠癌是腺癌

B.好发于降结肠

C.浸润型表现为肠腔狭窄，局限于一侧或呈环形

D.增生型表现为腔内充盈缺损

E.混合型多是晚期表现

什么是电度电价？