已知△OAB的顶点O（0，0）、A（2，0）、B（3，2），OA边上的中线所在直

2011年10月13日，广东佛山两岁女童悦悦连遭两车碾过，十多名路人经过未施援手，最后一名捡破烂的阿婆将孩子救起。可惜，21日，小悦悦经医院抢救无效而死亡。院方称小悦悦死亡的重要原因是全脑功能衰竭、接近脑死亡以及全身多个重要器官衰竭。下列对此事件的理解正确的有[ ]

①我们没有侵犯和危害其他生命和健康的权利，无论是亲友还是陌生人，都应以珍爱之心去对待，去呵护

②每种生命都有其存在的意义、价值，我们我尊重生命、关爱生命

③要善待其他生命，当他人生命遭遇困境时，要尽所能伸出援助之手

④世界上没有十全十美的生命

A．②③④

B．①②④

C．①②③

D．①③④

What do people do with their old, out of date but still useful computers? Most people don’t know how to deal with them. Many old computers are put away. Many more are simply thrown away as rubbish.

Finally, some companies are thinking of ways to bring down the number of old computers. Sony has agreed to help recycle old Sony products（产品）. Dell, Hewlett Packard and other companies now also take back some old computers of their own brands.

In some countries, laws have been passed, too. Computer companies have to pay for collecting and recycling their used products. And 70% of computer waste must be recycled. The idea behind the laws is that computer companies themselves should pay for the cost. That will encourage them to make computers which are easier and cheaper to repair and upgrade（升级）.

Yet many people are throwing away good computers, while others cannot afford them at all. Hundreds of organizations are working on this problem. They collect and repair old computers. Some also teach others how to repair computers. These repaired computers then go to schools, charities（慈善团体) or people who need them. Giving a used computer to one of these organizations can turn one person’s rubbish into someone else’s useful things and cut down waste, too.

根据短文内容，选择正确答案。（10分）

小题1:What do many people do with old computers?

A．They sell them.  B．They send them to others.    C．They stop using them.

小题2:How many computer companies are mentioned in the second paragraph?

A．One.             B．Two.                 C．Three.

小题3:According to the laws in some countries, computer companies must       .

A．recycle most of their products

B．collect all their used products

C．make more cheaper computers

小题4:What do the organizations do to solve the problem of old computers?

A．Help the computer companies to collect them.

B．Repair and send them to those who need them.

C．Help people to learn to use them.

小题5:What is the main idea of this passage?

A．Repairing old computers.

B．Encouraging to make cheap computers.

C．Recycling old computers.        

分泌蛋白在细胞内合成并分泌到细胞外穿过几层膜？

吊钩开口度增加尺寸达原尺寸15%应予报废。

颗粒污染物主要有尘粒、粉尘、烟尘和雾尘。其中，对人体危害最大的颗粒污染物是( )。

A．尘粒
B．飘尘
C．落尘
D．雾尘