已知函数f（x）=（x2-ax）ex（a∈R） （1）当a=2时，求函数f（x）

阅读理解，判断正（T）误（F）。

     One afternoon Bob and Jane were walking along a quiet street when they heard a big noise from the

street corner. They ran there and found that a small car had knocked into the side of a truck. Both the

car driver and the truck driver were hurt.

   "Bob," said Jane, "run back down the road to M r s Day's house. Ask her to call the police and the

ambulance(救护车) . Hurry. I'll stay here. "

    Bob went off as fast as he could. There was nothing Jane could do but wait. She knew that when

people were hurt in an accident, they shouldn't be moved.

    It wasn't long before the police car and the ambulance arrived. The policemen got the car door open

and moved the man out. Then they got the truck driver out. Luckily, the men weren't badly hurt, but they

were both taken to hospital. The policemen thanked Bob and Jane. "You were very good to act so

quickly when you saw the accident. Thank you for your help. "

( )l. The accident happened in a quiet street one afternoon.      

( )2. Bob,Jane,Mrs Day and the policemen heard the big noise.    

( )3. Both of the drivers were hurt in the accident.              

( )4. Jane asked Bob to call the police.                          

( )5. Jane had got the drivers out before the policemen arrived.  

重合在视图内的剖面图称为（）剖面图。

A.移出

B.重合

C.局部放大

D.局部

Originally introduced by Netscape Communications, （） are a general mechanism which HTTP Server side applications, such as CGI （） , can use to both store and retrieve information on the HTTP （） side of the connection. Basically, Cookies can be used to compensate for the （） nature of HTTP. The addition of a simple, persistent, client-side state significantly extends the capabilities of WWW-based （） .

Basically, Cookies can be used to compensate for the（）nature of HTTP.

A．fixed

B．flexible

C．stable

D．stateless

在ICD-10中，凡未提及病因的三尖瓣关闭不全，假定为（）。

A.风湿性

B.非风湿性

C.先天性

D.原发性

E.特发性

确定气缸圆柱度超限的依据是（）。

A、各缸中最大与最小圆柱度的平均值超限

B、各缸圆柱度平均值超限

C、任一缸圆柱度超限