What’s the price of the medicine（）

A．＄50.19.
B．＄15.90.
C．＄50.90.
D．＄15.19.

Computer science.

Physics.

Chemistry.

Mathematics.

Long long ago mankind began to use tools. Throughout the world, you can still find the tools which were used over two million years ago. People made such tools by hitting one stone (36) another. By this means, they got pieces from one of the stones. These pieces of stone were always (37) on one side. People utilized them to (38) skin and meat from some animals that were dead, (39) to make other tools from wood. Mankind needed (40) use tools since, unlike other meat-eating (41) , say lions, they did not have sharp teeth. Tools greatly helped people obtain food more (42) .

Tools helped (43) human intelligence as well when human worked with them. The human brain became bigger gradually, and human beings began to invent a growing number of tools. The stone piece was one of the (44) tools that were used by people, and maybe it was (45) . Some scientists hold it was the key (46) human beings’ success.

A new kind of tool has come into people’s view since 1960, that is, the silicon chip a small chip of silicon crystal. It is a bit (47) than a fingernail, but it is able to (48) several million "bits" of information or so. No doubt that it is an (49) brain.

Each year these chips grow cleverer, however (50) size becomes smaller, what’s more, their cost gets (51) .

It is (52) over two million years that human beings used chips, but human (53) changed so little at that time. Now we have made use of silicon chips for merely (54) years, but our life is changing faster with each passing day.

(55) will human life be like in two decades

American society is not nap (午睡) friendly. In fact, says David Dinges, a sleep specialist at the University of Pennsylvania School of Medicine. "There’s even a prohibition against admitting we need sleep". Nobody wants to be caught napping or found asleep at work. To quote a proverb: "Some sleep five hours, nature requires seven, laziness nine and wickedness eleven."

Wrong. The way not to fall asleep at work is to take naps when you need them. "We have to totally change our attitude toward napping", says Dr. William Dement of Stanford University, the godfather of sleep research.

Last year a national commission led by Dement identified an" American sleep debt "which one member said was important as the national debt. The commission was concerned about the dangers of sleepness: people causing industrial accidents or falling asleep while driving. This may be why we have a new sleep policy in the White House. According to recent reports, president Clinton is trying to take a half-hour snooze (打瞌睡) every afternoon.

About 60 percent of American adults nap when given the opportunity. We seem to have "a midafternoon quiet phase" also called "a secondary sleep gate". Sleeping 15 minutes to two hours in the early afternoon can reduce stress and make us refreshed. Clearly, we were born to nap.

We superstars of Snooze don’t nap to replace lost shut-eye or to prepare for a night shift. Rather,we "snack" on sleep, whenever, wherever and at whatever time we feel like it. I myself have napped in buses, cars, planes and on boats; on floors and beds; and in libraries, offices and museums.

The French and Italians consider literature more important than other forms of cultural expression.

Mathematics is considered most important by the British and the Germans.

In the eyes of the French, the Italians and Germans, history is more important than that in the eyes of the British.

For the Spanish, mathematics is somewhat more important than literature, history and economics/ politics.

甲和乙之间的买卖合同未生效，因为双方没有办理车辆过户手续

甲取得该车的所有权。因为动产所有权转让自交付时发生效力

甲不能向丙请求损害赔偿，因为其不是该车的所有权人

甲不可以向丙请求损害赔偿，因为该车转让没有登记，不得对抗第三人