支配腓肠肌的是 A．L2 B．L3 C．L4 D．L5 E．S1

阅读理解。

      Although there are no state controlled survival courses in Britain or the United States, there are various

independent organizations offering similar activities.

      Students can participate (take part) in outdoor training courses through university clubs and societies.

Anyone can register (登记) with such groups, which then organize courses, training and trips for all

members. 

      One of the most popular outdoor training programmes in both the US and Britain, is Outward Bound

(户外训练). It was founded in 1941 in Wales and attracts hundreds of thousands of adventurous types

every year.

      The courses are to broaden minds through experiences that build confidence, self-esteem (自尊) and

character. As well as specialist courses such as canoeing, leadership skills and sailing, participants can take

part in week long adventure training camps which include a host of sports and survival training education

skills. 

       Michael Williams, an American student, took part in an Outward Bound course last year. He said:"We

learned lots of first aid skills, lots of natural history, lots of environmental facts, and participated in a wildlife

preservation (protecting) programme. Beyond that, my favorite skills learned were sailing and rock climbing."

       Courses can last up to 40 days and are open to anyone over the age of 14. Students must be in general

good health, but do not need to be experienced in outdoor-sports. There is no selection process; everyone is

welcome, although new participants are advised to pick a course matching their physical power.

       Most of the British courses take place in the Beacons in Wales. Another similar organization is the UK

Survival School, which includes courses on learning to live with the environment, sailing and winter survival.

On a basic survival weekend students will learn how to get water and food, how to make fire and cook with

it, to find and build a shelter, control survival life support, how to cross rivers, send off an SOS signal, and

to use compasses by day and night.

      According to the leaders, such adventures are "an awakening, an exploration into unknown." Outward

Bound believes that participants will "use mind and body traveling some of the earth's roughest wildness

areas."

1. The advantage of the training courses is that _____. [ ]

A. participants can make friends with others

B. participants can visit some places of interest

C. participants can experience different adventures

D. participants can learn how wonderful nature is

2. In the Outward Bound course last year, the most exciting experience Michael Williams had was _____. [ ]

A. learning first aid skills

B. collecting facts of environment

C. preserving wildlife

D. rock climbing and sailing

3. What's the writer's purpose to write this passage? [ ]

A. To introduce the training course to readers.

B. To persuade readers to take part in the training courses.

C. To tell readers the danger of this training course.

D. To introduce the wonders of the world to readers.

1kg钠石灰的有效吸收时间约为（）。

A.2小时

B.4小时

C.6小时

D.8小时

E.10小时

每条临时限速报文包含1个临时限速用户信息包

性别其实是一种（）。

A.个人选择

B.先天特征

C.再现

D.个性

（）年画与桃花坞年画并称“南桃北柳”。

A.天津杨柳青

B.湖北杨柳湾

C.四川杨柳