燃气输配管气网工程中，具有直接供给用户使用燃气的功能的是( )。A．燃气调压站 B

关于神经纤维静息电位的形成机制，下述错误的是( )。

A．细胞外的K⁺浓度小于细胞内的浓度

B．细胞膜对Na⁺有通透性

C．细胞膜主要对K⁺有通透性

D．加大细胞外K⁺浓度，会使静息电位值加大

E．细胞内的Na⁺浓度低于细胞外浓度

严重二尖瓣狭窄，可以发生下列哪些并发症()

A．亚急性细菌性心内膜炎

B．肺水肿

C．右心衰竭

D．肺部感染

E．房颤

上路行驶的机动车未随车携带身份证的，交通警察可依法扣留机动车。

下列关于维护社会公平的说法正确的是( )。

A．是政府社会政策的目标之一

B．是我国社会主义制度的基本原则之一

C．是我国社会主义制度最高的价值目标之一

D．通过政府的干预行动而力求兼顾社会中各地区、各阶层和各类人群的利益，以达到均化目标

E．在社会主义市场经济条件下，我国的社会政策以维护社会公平为主要目标，通过各项社会政策来实质性地体现政府在维护社会公平方面的作用

It was a very hot day in the middle of summer, and there were no trees along the street. Mr. Read (41) his shop at half past five, and went out into the street and began walking to the bus. He was a very (42) man. The sun shone straight down the street, and in a few minutes Mr. Read (43) very hot.

A. opened B. reached C. closed

A small boy came out of another (44) in the street and followed Mr. Read. He stayed very (45) him all the time, and he kicked Mr. Read’s (46) several times. Mr. Read looked at him angrily each time.After the fourth time, Mr. Read stopped, turned (47) and said to the small boy, "What are you doing (48) following me like that! You’re going to hurt my feet."
"I’m (49) , but don’t stop me, please!" the small boy said. "It’s very hot today, and there isn’t (50) shade anywhere else in the street!\