填空题
Scientists in this field used to focus on______.
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【参考答案】
chemical responses
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单项选择题
In what way is American food different from food of other countries
A.American food is dull and tasteless.
B.American food has few spices beside salt, pepper and ketchup.
C.Americans have different kinds of food served at meals.
D.Americans prefer well-seasoned beef.
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单项选择题
Why was he shocked at the scene the next morning
A.The parrot was killed by the chickens.
B.The parrot was forcing the chickens to learn to say the word.
C.The chickens are really cleverer than the parrot.
D.The parrot can scream.
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