汽车起动系主要由（）组成。A、起动机B、发电机C、发动机D、蓄电池E、点火开关

今用简单随机抽样从含有6个个体的总体中抽取一个容量为2的样本．问：

①总体中的某一个体a在第一次抽取时被抽到的概率是多少？

②个体a不是在第1次被抽到，而是在第2次被抽到的概率是多少？

③在整个抽样过程中，个体a被抽到的概率是多少？

商鞅变法中有利于培植封建小农村经济的措施是（）

Are you a man or a mouse When people ask this question they want to know (1) you think you are a (2) person or a coward. But you will never really know the answer to this question (3) you are tested in real life. Some people (4) they are brave but when they come face to face with real (5) , they act like cowards. Others think of themselves as cowards, but when they meet danger, they act like (6)

Lenny had always thought of himself as a (7) person. He got worried before examinations. He worried about his job and health. All he wanted in life was to be safe and healthy. (8) , on January 15th, 2002, a plane crashed into the Potomac River in Washington. Lenny went to the river to see what was happening. He saw a woman in the (9) water. Lenny did not feel afraid. He kept very (10) and did a very dangerous thing. He jumped into the Potomac, (11) to the woman, and kept her head (12) the water. Seventy-eight people died that day. Thanks to Lenny, it was not (13) .

When you are in a very (14) situation and feel afraid, the body automatically produces a chemical in the blood. The chemical is called adrenalin. (15) adrenalin in the blood system, you actually feel per and per and are (16) to fight or run away. However, when you are absolutely terrified, the body can produce too much adrenalin. When this (17) , the muscles become very hard and you find you (18) move at all. You are then paralyzed with fear. This is (19) when we are very frightened, we sometimes say we’re "petrified". This word comes from the Greek word "petros", which means "stone". We are (20) frightened that we become stonelike.

8（）

A.So 

B.Therefore 

C.Then 

D.Actually

19世纪中期，美国纽约三大“便士报”是（）

A.《先驱报》、《太阳报》、《纽约时报》

B.《太阳报》、《纽约时报》、《论坛报》

C.《先驱报》、《纽约时报》、《论坛报》

D.《太阳报》、《论坛报》、《先驱报》