The passage indicates that ancient treatments for injury and disease were ______. It is believed by scientists that traditional

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问题 The passage indicates that ancient treatments for injury and disease were ______.
It is believed by scientists that traditional medicines ______.

选项 A、can cure all kinds of diseases
B、may cure some of today’s most serious diseases
C、are no longer useful for modern men
D、are too cheap to be useful

答案B

解析
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