下面给出四类可安装模块的扩展名，其中为各种不同网卡所配的网卡驱动程序的可安装模块的扩

维生素是维持机体正常生理功能和细胞内特异代谢反应所必需的一类微量低分子有机化合物。

下列各个特点与维生素无关的是（）

A.提供热能

B.以辅酶或辅基的形式参与酶的代谢

C.大多数维生素不能在体内组织中大量贮存，所以需经常摄入

D.大部分维生素不能在体内合成

E.维生素不是构成机体组织的原料

New York State has passed the USA’s first state law banning motorists talking on hand-held cell phones. The ban will begin November 1st, although drivers caught using hand-held cell phones will be given only warnings during the first month. 

First-time violators（违法者）will face a ＄100 fine. A second time call for a ＄200 fine and every violation after that will cost＄500. 

At least a dozen localities（地方）have established bans, starting in 1999; and 40 states have had bans proposed but not passed. At least 23 countries, including the Great Britain, Italy, Israel and Japan, ban drivers from using hand-held cell phones. 

There are about 115 million cell phones in use in the United States and more than 6 million in New York State. 

“To think that I’m not going to use cell phone when at the same time I can still use my laptop(膝上电脑), I still can read a paper, I can still change my trousers while driving 65 mph. I think there’s just something wrong,” an official said. 

Other critics noted that other things like eating, drinking coffee and applying make up while driving caused at least as much of a concern. They suggested that the ban include a broader range of things. 

小题1: How much fine will a hand-held cell phone user receive if he has been caught using it four times while driving after November？

A．＄500.

B．＄1000.

C．＄1200.

D．＄1300.小题2:. We can see from this passage that ____. 

A．the ban has been put into effect in most states in the U. S.

B．many of the developed countries forbid drivers using hand-held cell phones

C．over fifty localities or states ban drivers from using hand-held cell phones

D．more people in the U. S. are against the ban than for it小题3:The official mentioned in this passage ____. 

A．does not agree with this ban

B．doesn’t believe using hand-held cell phones while driving will cause any danger

C．doesn’t understand why hand-held cell phones alone should be banned among many others

D．believes changing pants while driving will cause greater danger小题4:The writer intends to tell us in the last paragraph that ______. 

A．it is not fair to have this ban passed

B．the ban will never be passed in the whole country

C．more activities of the same kind should also be banned

D．the ban will meet with more criticism

《中华人民共和国治安管理处罚法》这部法律：
①是靠国家强制力保证实施的 ②对全体社会成员具有普遍约约束力

③是由公安部制定并审议通过的 ④在维护社会公共生活方面发挥着重要作用[ ]

A、①③      
B、②④       
C、①②④    
D、②③④

据白居易《观刈麦》的描述，农家很少有空闲的月份。请问几月来时人们更加繁忙呢？

地质环境的基本特征？