5.Most plants use the suns light to produce food for themselves.( )

A . anaerobic bacteria B . aerobic bacteria C . air bubbles D . disinfection chemical

A .  Jar A B .  Jar B C .  Jar C D .  Jar D E .  Jar E

A . It is likely that equipment will break down frequently. B . It is likely that equipment will break down infrequently. C . It shows that maintenance is performed on an as needed basis. D . It shows that there are frequent crises when it comes to maintaining equipment.

A . filter B . filter drier C . heat exchanger D . air cooler

A．Right B．Wrong C．Not mentioned

Nobody knows who first invented it, but the umbrella was used in very ancient times. Probably the first to use it were the Chinese, way back in the eleventh century B.C. We know that the umbrella was used in ancient Egypt and Babylon as a sunshade. And there was a strange thing connected with its use: it became a symbol of honor and authority. In the Far East in ancient times, the umbrella was allowed to be used only by royalty or by those in high office. In Europe, the Greeks were the first to use the umbrella as a sunshade. And the umbrella was in common use in ancient Greece. But it is believed that the first persons in Europe to use the umbrella as protection against the rain were the ancient Romans. During the Middle Ages, the use of the umbrella practically disappeared. Then it appeared again in Italy in the late sixteenth century. And again it was considered a symbol of power and authority. By 1680, The umbrella appeared in France, and later on in England. By the eighteenth century, the umbrella was used against rain throughout most of Europe. Umbrellas have not changed much in style. during all this time, though they have become much lighter in weight. It wasn't until the twentieth century that women's umbrellas began to be made, in a whole variety of colors. The first use of umbrella was as ______. A．protection against rain B．a shade against the sun C．a symbol of power D．a symbol of honor

W: How about a nice cactus？ They always make lovely gifts. Where does the man's sister work？ A．In a hospital. B．In a 151ant store. C．In a law office. D．In a gift shop.

Two of them are【C2】______while the other six【C3】______from the sun than the earth is. The farther they are, the longer【C4】______they【C5】______around the sun. People noticed long ago that these traveling bodies moved around in the sky【C6】______definite paths. It is a【C7】______called gravity that【C8】______them in their paths. We know that every little bit of matter in the【C9】______pulls upon every other bit of mater. The pull between two bodies is【C10】______to the product of their masses. Because the sun is so large that pulls【C11】______the sun and the planets are thus great. If it【C12】______not for these pulls, the planets【C13】______off into space. In the same way【C14】______exists a pull between the earth and the moon, which keeps the moon【C15】______in its orbit around our planet, the earth. The gravity holds you to its surface, and pulls back to it the ball which you【C16】______into the air. Of course the ball also pulls【C17】______the larger earth, but the earth is so much larger that the pull【C18】______. Now remember that large bodies exert a greater pull on any body than smaller ones which contain【C19】______material. But each object in the universe, no matter how small, pulls on all other objects【C20】______extent. 【C1】 A．thing B．body C．matter D．substance

A．tropical B．simple C．native D．strange

A、with B、by C、against D、for

A．to make much more effort in his course work B．to cut down on his Union activities C．to turn to the Welfare Office D．to take part-time jobs for tuition fees

A、read，read B、reading，read C、read，reading D、reading ，reading

Man’s mind allows long—range planning and thinking.It enables such long—range planning as required for farming，hunting，and tool making.These efforts require the ability to form. concepts of long—term cause and effect chains.“I need t0 make a spear tonight SO I can hunt tomorrow and have food for the next 7 days.”There may be environments where people could survive for a while without long—range planning，but without the results 0f knowledge like spears，fire，and 0ther technologies，people would get out—bred by Other animals and die out。 Man’s mind is his tool for survival，but like all tools，it must be properly used.The mind makes good use 0f knowledge，and knowledge can only be 0btained through reason.Without reason，there is no knowledge，and thus no survival。 You must recognize reality and act in accordance with it in order t0 be successful.To the extent that you use reason as your method of judgment in knowledge and action，you will survive and flourish .If you ignore or escape form. reality you will suffer and die. It is very important t0 note that survival by reason requires the freedom to act according t0 your reason.That is why people d0 not develop well in the control of others，and can not survive when they are subject t0 foree that destroys their ability to act on reason. 26.It is his mind that enables a farmer t0 know how to_______. A.make spears B.hunt for animals C.make iron tools D.cultivate crops 27.The first two paragraphs show that man’s mind______. A. is his basic means Of survival B. enables him to act at will C. is used to protect themselves D. helps him 100k int0 reality 28. In order to survive，man should_______. A.be conquered by 0thel"allimals B.make a long—range plan for the future C.1earn to recall knowledge D.1earn to think reasonably 29.Without the results Of knowledge like spears，fire，and Other technologies，people_____. A.Could only survive for7 days B.would kill off a11 the animals C.would be controlled by 0thers D.would disappear from the earth 30.It is reasonable that if people want to survive，they should______. A.develop well in the control of others B.ignore or escape from reality C.have freedom to act on reason D.be subject to certain environments

1.What is the greatest problem that the living things face() A、They have to eat other things. B、They have to fight not to be eaten. C、They have to live on in their own way. D、They have to live in the sea. 2.In the article, how many ways that the sea animals use in order to survive are mentioned() A、One B、Two C、Three D、Four 3.Jelly fish is an example of animals() A、who can reproduce very fast B、who can protect themselves from being attacked by poison C、who can change their colour D、who have very good senses 4.The underlined word "survive" in Paragraph 2 means() A、remain alive B、live struggle for food？ C、feed on something 5.Which of the following is NOT mentioned as a way to help animals survive() A、Sensitive skin. B、Sharp eyes. C、Fine smell. D、Good hearing

A．filteringB:filling

A．are often harmful to cattle health B．contain little natural ingredients C．are low in vitamins and minerals D．are not suitable for the cattle to eat at all