A.cure AIDS |
B.kill the AIDS virus |
C.prevent the AIDS virus from spreading |
D.produce new anti-AIDS cells |
A.itself |
B.the blood cells |
C.the CD4 protein |
D.the genetic material of T4 lymphocytes |
A.cloned protein stays On the T4 cells |
B.it connects to cloned protein more effectively |
C.cloned protein is made by genetic engineering methods |
D.cloned protein floats freely,and many more can be put into the blood |
A.The new technique has been tested in labs. |
B.The new technique is being tested in animals. |
C.The new technique may be tested in humans. |
D.The new technique is now under clinic test. |
A.AIDS-a deadly disease |
B.A new technique in fighting AIDS |
C.The spread of AIDS virus |
D.The cloned CD4 protein |
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A.No one has come to disturb you. |
B.Everything is so quiet and calm around you. |
C.The book you are reading is so interesting and attractive. |
D.Your book is overdue; you are finishing it at a very fast speed. |
A.They resemble human friends exactly. |
B.They are unfamiliar types we like. |
C.They never desert us. |
D.They never hurt our feelings. |
A.Your wish to visit some far-off place can be realized through the pages of the books. |
B.To escape from the dull realities of everyday life you should take up reading. |
C.Books can always help you to live a colorful life. |
D.You may obtain valuable experience from reading good books. |
A.“to attract someone’s attention” |
B.“to distract someone’s attention” |
C.“to make someone very tired” |
D.“to make someone interested” |
A.in books the world is more accessible to us |
B.we can ask to go anywhere in the world |
C.we can make a claim to everything in this world |
D.we can make a round-the-world trip free of charge |
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D.is only an environmental friendly farm |
A.depend far less on sunlight |
B.greatly increase the use of soil |
C.help to protect the limited gardens |
D.reduce the use of harmful pesticides |
A.have been put into use |
B.only use hydroponics to grow food |
C.need less room than conventional farms |
D.may increase the transportation costs |
A.Vertical farms for our future |
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A.a(chǎn) planet which has a clear neighborhood around its orbit |
B.a(chǎn) satellite of Neptune which was discovered in 1930 |
C.the smallest planet in the solar system |
D.a(chǎn) planet which has an orbit around the sun |
A.tell us a small fish can hardly survive in the big pond |
B.tell us the size of an object really matters |
C.mean that a small planet can hardly exist in the solar system |
D.explain the disappearanee of Pluto in the solar system |
A.eight | B.nine | C.less than nine | D.more than nine |
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A.They don’t use teeth to eat. |
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A.good eyesight | B.bad eyes |
C.excellent eyes | D.poor eyesight |
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D.Do sea turtles grow very fast? |
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A.The machine will be a big success. |
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A. www. europa-page. Com | B.www. Spoton. de |
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