单项选择题

A. Iced coffees sold by some popular chains are contaminated.
B. Some iced coffees have as many calories as a hot dinner.
C. Some brand-name coffees contain harmful substances.
D. Drinking coffee after a meal is more likely to cause obesity.
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单项选择题
A. To test how responsive dolphins are to various signals.B. To examine how long it takes dolphins to acquire a skill.C. To see if dolphins can learn to communicate with each other.D. To find out if the female dolphin is cleverer than the male one.
A. To test how responsive dolphins are to various signals.
B. To examine how long it takes dolphins to acquire a skill.
C. To see if dolphins can learn to communicate with each other.
D. To find out if the female dolphin is cleverer than the male one.
单项选择题
A. It has attracted worldwide attention. B. It will change the concept of food. C. It can help solve global food crises. D. It will become popular gradually.
A. It has attracted worldwide attention. B. It will change the concept of food.
C. It can help solve global food crises. D. It will become popular gradually.
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