问题描述：
sat 改错题
recent medical breakthrough,including the discovery of a vaccine to show the AIDS virus,have encouraged researchers;and a cure is still eluding them.
答案为分号后的and 错误 why?是不是分号后不能有and这种连接词?
recent medical breakthrough,including the discovery of a vaccine to show the AIDS virus,have encouraged researchers;and a cure is still eluding them.
答案为分号后的and 错误 why?是不是分号后不能有and这种连接词?
问题解答：
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