A.a(chǎn)re small animals |
B.a(chǎn)re easily found by birds |
C.a(chǎn)re dangerous to their enemies |
D.change their colors to protect themselves |
A.have the colors much like the trees |
B.move quickly |
C.like brown and grey colors |
D.live in forests |
A.it is very big and strong |
B.the liquid it sends out help it escape from its enemies |
C.the liquid it sends out can kill its enemies |
D.it swims faster than any other fish |
A.The Change of Colors for Animals and Pests |
B.Colors of Different Animals and Pests |
C.The Main Use of Colors for Animals and Pests |
D.Some Animals and Pests |
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A.protect the ISS |
B.make the astronauts work harder |
C.provide better water and food for the astronauts |
D.save the cost of sending water up to the ISS |
A.4.4 thousand | B.11 thousand |
C.48.4 thousand | D.24 million |
A.freezing | B.heating |
C.shaking | D.precipitating(沉淀) |
A.water recycling at the ISS |
B.the International Space Station |
C.a(chǎn) high-tech machine |
D.the cost of NASA |
A.The recycled water is much better than that from a city tap. |
B.The high-tech machine will recycle all the water used on the station. |
C.The ISS astronauts use more water than us. |
D.The high-tech machine can only recycle urine to make water. |
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A.Because they had good education. |
B.Because they wanted very much to become well-known. |
C.Because they worked hard. |
D.Because their families were very rich. |
A.A teacher can make his pupils men of strength and courage. |
B.A teacher can make his pupils worthy. |
C.A teacher can help his pupils become well-known. |
D.A teacher can do nothing. |
A.they are sure to be very famous in the world |
B.they can be successful in their lives |
C.they no longer need help |
D.they are sure to fail |
A.He thinks highly of those who are working hard to be successful. |
B.He thinks highly of parents and teachers. |
C.He wants to be a famous scientist. |
D.He thinks highly of those who are poor. |
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A.Pollution reduction |
B.Pollution of bicycle |
C.Transportation of China |
D.a(chǎn)dvantages of bicycling |
A.Bicycling makes people stronger |
B.Bicycles can travel on narrow paths |
C.Many bicycles are stolen every year |
D.Bicycles seldom(很少)get stuck in traffic jams |
A.Paragraph 1 | B.Paragraph 2 | C.Paragraph 5 | D.Paragraph 6 |
A.a(chǎn)ll Chinese students ride bicycles |
B.if you ride a bicycle for 30 minutes a day, you’ll be thinner |
C.there are no bicycles that burn energy |
D.you can’t enjoy beautiful views unless you ride a bicycle |
A.A train | B.A chair | C.An orange | D.A television |
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A.late and get up early |
B.early and get up late |
C.early and get up early |
D.late and get up late |
A.ten hours’ sleep |
B.nine hours’ sleep |
C.twelve hours’ sleep |
D.eight hours’ sleep |
A.daytimes |
B.it is dark |
C.we are taking exercises |
D.it is late afternoon |
A.weak | B.clever | C.health | D.strong |
A.makes more blood |
B.helps the blood to flow |
C.makes food for our blood |
D.makes our brain tired |
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