据美国《华夏时报》报道，“丝绸之路”这个连接了数百年中西方文化交流的纽带，今年成

为了使公路交通有序、安全，路旁立了许多交通标志牌，如图所示，甲是限速标志，表示允许行驶的最大速度是80 km/h；乙是路线指示标志，此处到青岛还有150 km。上述两个数据表达的物理意义是

A．80 km/h是平均速度，150 km是位移

B．80 km/h是瞬时速度，150 km是路程

C．80 km/h是瞬时速度，150 km是位移

D．80 km/h是平均速度，150 km是路程

父母红细胞ABO血型分别为A与B，子代可能出现的血型为（）

A.A

B.AB

C.A、B、O

D.A、B、O、AB

E.A、B、AB

In 1993, New York State ordered stores to charge a deposit on beverage (饮料) containers. Within a year, consumers had returned millions of aluminum cans and glass and plastic bottles. Plenty of companies were eager to accept the aluminum and glass as raw materials for new products, but because few could figure out what to do with the plastic, much of it wound up buried in landfills (垃圾填埋场). The problem was not limited to New York. Unfortunately, there were too few uses for second-hand plastic.

Today, one out of five plastic soda bottles is recycled (回收利用) in the United States. The reason for the change is that now there are dozens of companies across the country buying discarded plastic soda bottles and turning them into fence posts, paint brushes, etc.

As the New York experience shows, recycling involves more than simply separating valuable materials from the rest of the rubbish. A discard remains a discard until somebody figures out how to give it a second life—and until economic arrangements exist to give that second life value. Without adequate markets to absorb materials collected for recycling, throwaways actually depress prices for used materials.

Shrinking landfill space, and rising costs for burying and burning rubbish are forcing local governments to look more closely at recycling. In many areas, the East Coast especially, recycling is already the least expensive waste-management option. For every ton of waste recycled, a city avoids paying for its disposal, which, in parts of New York, amounts to savings of more than $100 per ton. Recycling also stimulates the local economy by creating jobs and trims the pollution control and energy costs of industries that make recycled products by giving them a more refined raw material.

Recycling has become the first choice for the disposal of rubbish because ().

A. local governments find it easy to manage

B. recycling has great appeal for the jobless

C. recycling causes little pollution

D. other methods are more expensive

可引起低血钾的原因有（）。

A.钾的摄入不足

B.尿钾排出过多

C.碱中毒

D.胰岛素过多

E.钡中毒

缓释、控释制剂主要有（）型和（）型两种。药物以分子或微晶、微粒的形式均匀分散在各种载体材料中，则形成（）型缓释、控释制剂；药物被包裹在高分子聚合物膜内则形成（）型缓释、控释制剂。