石家庄一厂长这样说：“走得正，行得端，领导才有威信，说话才有影响，群众才能信服。”这

中心静脉压的高低可反映（）。

A.动脉血压高低

B.胸膜腔的压力

C.静脉系统的容量

D.静脉回心血量和心脏射血能力的相互关系

E.全身血容量与右心功能之间的关系

阅读下列材料，从所给的五个选项（A、B、C、D、E　）中，选出符合各小题要求的最佳选项。Jim 的几位朋友想买汽车，请仔细阅读题，选出符合各自要求的最佳选项。

小题1:Dennis is a successful businessman. He has a big family. He wants to buy a car made in Europe. The car should be safe.

小题2:Gary has a big company, but he doesn’t like to show off. He likes a popular car of about 200,000 yuan. The car should have good quality and be big enough.

小题3:Arthur likes travelling and playing sports. He likes playing sports. He likes driving to the mountains to spend weeks with his friends.

小题4:Andy is a rich young man. He likes driving fast. He wants to buy a famous and fashionable car.

小题5:Cindy is a beautiful young lady. She has just found a job. She wants to buy a cute car.

什么是无扰切换？自动系统中，实现无扰切换应满足什么条件？

孕妇需用解热镇痛药时可选用( )。

A．对乙酰氨基酚
B．吲哚美辛
C．阿司匹林
D．可的松
E．哌替啶

上腹部手术折线时间为（）

A．4～5天

B．6～7天

C．7～9天

D．10～12天

E．14天