A.its death rate was up to ten percent |
B.those who caught it were certain to die |
C.one in ten people in the world died of smallpox |
D.one in ten deaths in the world was caused by smallpox |
A.make smallpox much milder |
B.stop people from getting smallpox |
C.protect people against any disease |
D.prevent people’s scars after smallpox |
A.The first experiment with cowpox was made by a British doctor. |
B.After 1977 smallpox disappeared around the world according to WHO. |
C.Vaccination had existed among ordinary farmers before being discovered. |
D.Vaccination can be used to protect people in the world against not only smallpox. |
A.vaccinations bring many new problems |
B.vaccinations end the spread of diseases |
C.there is a long way to go to fight against diseases |
D.there is a long way to go to discover new diseases |
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A.why girls can easily get sad. |
B.what to do when we are sad. |
C.how to make new friends with girls. |
D.how to make a sad female friend happy again. |
A.We should ask her why she feels sad. |
B.We should say something nice to her. |
C.We should spend time listening to her. |
D.We should give her some good advice. |
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A.What pets bring to their owners. |
B.How pets help people calm down. |
C.People’s opinions of keeping pets. |
D.Pet’s value in medical research. |
A.he has a pet companion |
B.he has less stress of work |
C.he often does mental arithmetic |
D.he is taken care of by his family |
A.They have lower blood pressure. |
B.They become more patient. |
C.They are less nervous. |
D.They are in higher spirits. |
A.people with dogs did more exercise |
B.dogs lost the same weight as people did |
C.dogs liked exercise much more than people did |
D.people without dogs found the program unhelpful |
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A.think cooking is especially complicated |
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C.a(chǎn)re busy and not interested in cooking |
D.a(chǎn)re likely to eat healthfully |
A.it contains only a small percentage of real juice |
B.it is natural,nutritious and prepared from real oranges |
C.it is largely orange-colored sugar water |
D.it produces nothing but calories |
A.a(chǎn)n effort with no results |
B.a(chǎn) search for a diet without fruits |
C.a(chǎn) research on fruitless diet |
D.a(chǎn) diet serving as medicine |
A.a(chǎn) balanced diet can result in being fat |
B.staying thin and healthy are both possible |
C.lack of variety in diets leads to staying thin |
D.vitamins are some kind of substitutions(代替物)for food |
A.carbohydrates,protein and fat are enough to support a human life |
B.vitamins and minerals are almost of no value |
C.carbohydrates,protein and fat are as important as vitamins and minerals |
D.without carbohydrates,protein and fat,vitamins and minerals are of no use |
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A.Green tea makes you less active. |
B.Green tea makes you less disabled. |
C.Green tea makes you more friendly. |
D.Green tea makes you more educated. |
A.form | B.a(chǎn)bsorb | C.remove | D.prevent |
A.prove whether the Japanese study is correct |
B.know if green tea drinkers are independent |
C.help nearly 14,000 adults aged 65 or older |
D.study green tea's effect on cholesterol |
A.Reduce functional disability. |
B.Keep old people active. |
C.Make more friends. |
D.Suffer fewer heart attacks. |
A.green tea is safe to drink |
B.green tea should be drunk properly |
C.green tea is poisonous for old people |
D.vitamin K is helpful to us |
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A.Temperature change. | B.NIR light. | C.Acidity change. | D.UV light. |
A.It breaks down when it absorbs NIR light. |
B.It falls off the polymer and triggers drug release. |
C.It has not come onto the market up till now. |
D.It is not effective enough and could be poisonous. |
A.protected | B.formed | C.exposed | D.combined |
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A.new | B.wonderful |
C.popular quickly | D.loved by people |
A.people refuse to accept fad diets |
B.fad diets can help people to lose weight |
C.a(chǎn) man can lose weight after eating a fad diet |
D.fad diets are now welcomed by people |
A.a(chǎn)re very helpful |
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C.won't cost much |
D.include lots of nutrients |
A.that fad dieters are often overweight |
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C.organic farming is far from being as popular as expected |
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A.a(chǎn)rgue for | B.care for | C.struggle for | D.pay for |
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B.It refers to farming with chemical fertilizers rather than natural fertilizers. |
C.It refers to farming with soil rather than any other thing. |
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B.the idea that organic farming is safer has not been proven by science |
C.organic farming is accepted by the UK’s House of Commons committee |
D.organic farming is preferred to traditional farming |
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A.explain the bad effects of drugs on people’s health |
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C.persuade people out of such bad habits as smoking and using drugs |
D.tell us the links between the drug Ecstasy and the animal models |
A.can permanently destroy one’s brain cells |
B.can cause serious brain damage occasionally |
C.will result in immediate symptoms |
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B.Because their brain is similar to human beings. |
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D.Because they will soon get well after the experiment. |
A.Leah’s death after a single tablet |
B.the symptoms after smoking |
C.the damage to the brain systems |
D.repeated use of the drug |
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