A.communication |
B.monitoring the weather condition |
C.doing some research |
D.taking pictures |
A.the earth |
B.the satellite itself |
C.the rotation of the satellite |
D.the rope |
A.Because of the force from the earth. |
B.Because the satellite is too big. |
C.Because of the force created by the rotation of the satellite around the earth. |
D.Because people on earth have made ropes to tie the satellites tightly. |
A.when it flies faster |
B.when its speed slows down |
C.when people cut the rope |
D.when there is no electricity in it |
A.There are four forces acting on the satellite. |
B.The force of gravitation makes the satellite go round and round. |
C.As time goes by, the satellite will finally fall down. |
D.The satellite will stay in space forever. |
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B.his parents haven't a good memory |
C.he doesn't make good use of his memory |
D.he doesn't use his arms or legs for some time |
A.they will become thin |
B.they will become weak |
C.they begin to ache all over |
D.you can't use them any more |
A.Your memory needs chance for practice. |
B.A good memory is inherited(遺傳) from parents. |
C.Your memory works in the different ways as your arms or legs. |
D.Don't learn to read and write if you want to have a good memory. |
A.his own fault | B.his parents' fault |
C.his teachers' fault | D.his friends' fault |
A.how to read and write well |
B.how to have a good memory |
C.how to use our arms or legs better |
D.how to learn from the people who can't read or write |
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B.read books about swimming |
C.learn from other people first |
D.play football well first |
A.buy a good football |
B.play football |
C.watch others play football |
D.put your football away |
A.we learn English by using it |
B.swimming needs water |
C.playing football is easy |
D.learning English is difficult |
A.speak English | B.write in English |
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B.Almost every country has at least one important river. |
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D.Rivers play an important part in the lives of people. |
A.keeping the rivers clean |
B.making electricity |
C.washing clothes |
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A.people’s drinking water too much |
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C.chemicals and other materials |
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A.By telling about a famous one. |
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C.By describing how fast it moves. |
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B.To tell readers about famous comets. |
C.To explain the importance of comets. |
D.To encourage readers to look for comets. |
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B.to feed plants |
C.to build a house |
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A.大力士 | B.巨人 | C.怪獸 | D.野人 |
A.send him some food | B.a(chǎn)sk for some food |
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A.The lion ate the wolf. | B.The wolf ate the lion. |
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