以下不属于软膏剂基质要求的是A．润滑无刺激，稠度适宜，易于涂布 B．性质稳定，与主药

公平总要受到一定的社会条件的制约，任何社会都会存在一些不公平的现象。对此理解正确的是[ ]

A．人们追求公平只是一种幻想，是不可能实现的

B．对于社会不公平的现象，我们可以熟视无睹

C．只要我们努力摆脱社会条件的制约，那么我们就可以达到绝对公平

D．公平总是相对的，没有绝对公平的社会

Since people first sent rockets into space in the 1950s, we have been leaving behind all sorts of things. Some of them, like the camera, were lost by astronauts while they did work outside their spaceship. But much of the space junk is made up of little pieces of things that were once bigger objects, until they struck each other and broke apart.

Some things we send into space fall back toward the earth and burn up in the atmosphere. But larger pieces sometimes survive the extreme heat and hit the ground or the ocean at great speeds. So there is always concern that something may fall from the sky and do some harm.

But space junk falling on housetops (屋顶) is not the biggest worry. Scientists are concerned about what happens when an empty rocket strikes another while orbiting (绕轨道飞行) the earth. Two big things become many smaller things. They then hit other things. The pieces get smaller and smaller until they form a cloud of junk that blocks the path of future space vehicles.

So what can be done to clean up the space around our planet? Marco Castronuovo, an Italian researcher, talks about sending a satellite into space that would get very close to some of the larger pieces of space junk. The satellite would connect a small rocket to the useless object. When the rocket explodes, it pushes the junk into a lower and slower orbit, nearer the earth. After a time, the junk burns up in the atmosphere.

Mr. Castronuovo has proposed (提议) using a number of small satellites with robotic arms. One arm would catch the space junk, and another arm would connect the rocket. He imagines that each satellite would jump from one large piece of junk to another. He thinks this method could destroy about ten large objects each year.

Scientists have been concerned about space junk for many years. Right now, the costs of the clean-up have been too great. Mr. Castronuovo says his system could be put in place for a much more reasonable amount of money.

小题1:Much of the space junk _____.

A．was thrown by the astronauts

B．is from broken spaceship

C．is made up of small pieces of things

D．returns to the earth piece by piece小题2:Scientists are most worried that the space junk _____.

A．will stop the future space vehicles

B．will do harm to the atmosphere

C．will fall on the housetops

D．will burn up in space小题3:What does Marco Castronuovo think of his system?

A．It can remove space junk completely.

B．It can save a large amount of money.

C．It can create a large amount of space.

D．It can develop robotic technology.

课内名著阅读。

1、请你谈谈美国作家马克·吐温创作小说《汤姆·索亚历险记》的原因是什么？

2、你喜欢汤姆·索亚的性格吗？为什么？

按《中华人民共和国安全生产法》的规定，矿山、建筑施工单位和危险物品生产、经营、储存单位从业人员有多少的时候应当设置安全生产管理机构或配备专职安全生产管理人员？（）

A、300人以上

B、100人以上

C、不论从业人员有多少

根据法律规定，王甲( )给王乙投以死亡为条件的保险合同。

A．有权

B．无权

C．有权，但要经过王乙同意

D．无权，除非经过王某同意