航空运输中，托运人可以对航空货运单上除以下（）内容以外的其他条款向承运人提出更改。

混凝土收缩试验，试件应密封处理，如在180d式验间隙内质量变化超过( )g结果无效。

A．5

B．10

C．15

D．20

Do you want to live another 100 years or more? Do you want to live never to die? Some experts say, it will be not a dream one day. Modern technology will make it come true. Man will live more years beyond what is now seen as the natural limit of the human life.

“ I think we are knocking at the door of immortality,” said Michael, a professor and author of two books on human life expectancy. “I think by 2075 we will see it and it’s no longer a dream. Human’s life expectancy may have not limit.”

At the meeting in San Francisco, Donald Louria, a professor at New Jersey Medical School said advances in using genes as well as other technology make it likely that humans will live in the future beyond what has been possible in the past. “There is a great push so that people can live from 120 to 180 years,” he said. “Some have suggested that there is no limit and that people could live to 300 or 500 years.”

However, many scientists are doubtful about it and say the human body is just not designed to last more than about 120 years. Even with healthier lifestyles and less disease, they say failure of the brain and other parts of the body will finally lead all humans to death.

Scientists also hold different opinions on what kind of life man might live.  “If you pass 120, you know; could you be healthy enough to have good quality of life? It’s a big question.” said Leonard Poon, director of the university center.  “At present people who could get to that point are not in good health at all.”

小题1:The underlined word in the second paragraph probably means _____.

A．dying slowly

B．living longer

C．living forever

D．dying quickly小题2:Donald’s attitude is that______.

A．human beings may never die in the future

B．it is not certain how long humans can live

C．the human body can last about 120 years

D．it is possible for man to live longer in the future小题3:What would be the best title for this text?

A．Living longer or not

B．Science and long living

C．No limit for human life

D．Healthy lifestyle and living小题4:In the last sentence “get to that point” means ____.

A．get that idea

B．get to 120 years old

C．know how to live forever

D．have good quality of life

干细胞性黄疸时尿红素定性试验结果为（）

A.正常

B.阴性

C.阳性

D.强阳性

E.1：20阴性

下面关于网络互连设备叙述错误的是（）。

A、在物理层扩展局域网可使用转发器和集线器。

B、在数据链路层扩展局域网可使用网桥。

C、以太网交换机实质上是一个多端口网桥，工作在网络层

D、路由器用来互连不同的网络，是网络层设备。

空调系统启动顺序是（）

A.压缩机、通风机、冷凝风机

B.通风机、压缩机、冷凝风机

C.通风机、冷凝风机、压缩机