职业生涯规划的主体是个人，与组织无关。

工业导火索和火雷管于（）年被国家强制淘汰。

A.2007

B.2008

C.2009

D.2010

目前国内麻醉医生最常用的麻醉方法是（）

A.局麻

B.针麻

C.脊麻

D.硬膜外麻醉

E.气管内插管全麻

个人耐用消费品贷款期限一般在( )年以内，最长为( )年(含)。

A．1；5

B．2；5

C．1；3

D．2；3

     Pretoria, South Africa-Hundreds of swimmers play in the water along a South African beach.

Suddenly a huge shark appears off shore and heads for the bathers. Before it can get close to the

swimmers, the shark, for some mysterious reason, starts swimming parallel to the beach. Then it turns

away from the shore and heads out to sea,leaving the swimmers untouched.

     Such a scene will soon become common along shark-in-fested (鲨鱼成群的) shores. An electrical

engineer from the University of Pretoria has  developed  an  electrical  system  that  repels (击退 )

sharks by controlling their movements. Confused by this action, the sharks end up turning away from the

beach.

     In  this  unusual  shark-repellent method , an insulated (绝缘的)cable is buried on the bottom of the

sea around a beach where people swim. When an electric current is sent through the cable, an electric

field is produced in the water above the cable.

    When a shark swims into the electric field, nerve cells just below the shark's skin will detect the field.

The electricity produces a reflex(反射) action  in the shark's  muscles, causing  the dangerous animal

with sharp teeth to swim parallel to the cable. Confused by increasing loss of control of its muscles, the

shark suddenly changes its direction and heads seaward, away from the electric field.

    In a test of the invisible new shark-repellent system, a cable was placed around a beach in St. Lucia

an island in the tropics. A protective net, which had been installed around the beach a long time ago to

keep sharks away from swimmers, was left in place during the experiment.

     When the electric field was left on for more than a year and a half, no sharks were found in the net.

However, when the power was turned off, 89 sharks ended up in the net.

     Using the electric-wall method instead of net to protect bathers would avoid the needless death of

many sharks, said biologists. Currentjy, thousands of sharks die each year when they become trapped

in protective nets that surround holiday resorts in Africa and Australia. About 10 to 15 humans are killed

by sharks annually.                        

1. Why doesn't the shark attack the swimmers according to the passage?

A. Because there are many swimmers in the water.

B. Because the shark doesn't want to eat the swimmers.

C. Because of some mysterious reason from the God.

D. Because there is an invisible electric field confusing the shark.

2. An electrical engineer from the University of Pretoria has developed_________.

A. a protective net

B. a new shark-repellent system

C. the electric field

D. an insulated cable

3. An electric field is produced in the water above the cable_________. 

A. only when a shark swims into the electric field

B. only when an insulated cable is buried on the bottom of the sea around a beach where people swim

C. only when an electric current is sent through the cable

D. only when the sharks are trapped in protective nets

4. Which of the following is NOT TRUE according to the passage?

A. Protective nets had been installed around the beach earlier than the new shark-repellent system.

B. This new kind of shark-repellent system will take the place of the protective nets.

C. Thousands of sharks die and about 10 to 15 humans are killed by sharks each year in Africa and

Australia since this new system was put into use.

D. Using the electric-wall method instead of nets to protect bathers would avoid the needless death of

many sharks.

一个步行周期是指（）.

A、从一侧下肢着地到另一侧着地为止所走的距离

B、从一侧足跟着地到该侧足跟再次着地为止所走过的距离

C、从一侧足跟着地到该侧足跟再次着地为止所用时间

D、从一侧下肢着地到另一侧着地为止所用时间

E、从一侧下肢着地到另一侧下肢着地为止所用的时间.