单项选择题

A. Laughter is good for health. B. Laughter is terrifying sometimes.
C. Laughter is very comfortable. D. Laughter is good for social communication.
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单项选择题
A. Dementia is the loss of physical ability. B. Dementia is the loss of self-cure ability. C. Dementia is the loss of mental ability. D. Dementia is the loss of immune ability.
A. Dementia is the loss of physical ability. B. Dementia is the loss of self-cure ability.
C. Dementia is the loss of mental ability. D. Dementia is the loss of immune ability.
单项选择题
A. She thinks to breed crops selectively is different from modifying genes of crops.B. She thinks genetically modified food is not harmful to health.C. She thinks DNA technology has a negative effect on people’s life.D. She thinks genetically modified food should be banned from people’s diet.
A. She thinks to breed crops selectively is different from modifying genes of crops.
B. She thinks genetically modified food is not harmful to health.
C. She thinks DNA technology has a negative effect on people’s life.
D. She thinks genetically modified food should be banned from people’s diet.
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