[单项选择]由于机体细胞的过氧化损伤是人类衰老的最主要原因，所以（）有一定程度的延缓衰老的作用。
A. 生物素
B. 番茄红素
C. 焦磷酸硫胺素
D. 维生素B₂

[判断题]《民法典》合同编调整因合同产生的民事关系。
A.正确
B.错误

[判断题] ( )防尘防毒的管理措施不包括对从事有害有毒作业人员的查体及健康维护。
A.正确
B.错误

[判断题]家庭美德是每个公民在家庭生活中应该遵循的行为准则，涵盖了夫妻、长幼、邻里之间的关系。
A.正确
B.错误

[填空题]塑性材料经过（）、（）、（）、（）四个过程而形成切屑。

[单项选择]砂泵安装需（）矿浆面1—3米压力式给矿才能工作。
A. 高于
B. 等于
C. 低于

[单选题]进行桥址三角网测量时的基线一般有( )。
A.一条
B.二条
C.三条
D.四条

[单项选择]MIPS是衡量CPU处理速度的一种常用指标，它的含义是( )。
A. 每秒钟平均可执行的单字长定点指令的数目
B. 每秒钟平均可执行指令的数目
C. 每秒钟平均可执行的浮点指令的数目
D. 每秒钟平均可执行的算术运算指令的数目

[单项选择]If the population of the earth goes on increasing at its present rate, there will eventually not be enough resources left to maintain life on the planet. By the middle of the 21st century, if present trends continue, we will have used up all the oil that drives our cars. Even though scientists develop new ways of feeding the human race, the crowded conditions on earth will make it necessary for us to look for open space somewhere else. But none of the other planets in our solar sys- tem are capable of supporting life at present. One possible solution to the problem, however, has recently been suggested by American scientist, Professor Carl Sagan.
Sagan believes that before the earth’s resources are completely exhausted it will be possible to change the atmosphere of Venus. The difficulty is that Venus is much hotter than the earth and there is only a tiny amount of water there.
Sagan suggests that algae(藻类) organisms(生物，有机体) that can live in extremely hot or cold atmospheres
A. In a fairly short time, the algae will break down the carbon dioxide on Venus into oxygen and carbon.
B. The atmosphere of Venus can be changed into the same one as earth.
C. Algae organism can live in extremely hot or cold atmospheres and at the same time pro- duce oxygen.
D. As soon as the algae have done their work, the atmosphere of Venus is suitable for people to live.

[判断题]使用风动卸砟车卸道砟时，卸车人员应掌握好车门开启角度，可以单侧卸砟。卸砟完工后，用料单位应及时清理道床。
A.正确
B.错误

[判断题]( )中间站利用本务机车调车,应使用附有车站示意图的调车作业通知单。
A.正确
B.错误

[单项选择]《特别重大事故调查程序暂行规定》是国务院( )发布的。
A. 1988年3月29日
B. 1989年1月1日
C. 1989年3月29日
D. 1989年12月29日

[填空题]Face-to-face contact is by no means the only form of communication and during the last two hundred years the art of mass communication has become one of the (26) factors of contemporary society. Two things, above others, have caused the enormous growth of the communication industry. Firstly, inventiveness has led to (27) printing, telecommunications, photography, radio and television. Secondly, speed has (28) the transmission and reception of communications so that local news often takes a back seat to national news, which itself is often almost eclipsed by international news.
No longer is the (29) of information confined to a privileged (30) . In the last century the wealthy people with their own library were indeed fortunate, but today there are public libraries. Forty years ago people used to (31) to the cinema, but now far more people sit at home and turn on the TV to watch a programme that is being (32)