全國吸煙者,男性占52.9%。那麽在男性中,吸煙者占多少%?怎麽也得70%以上吧。如果是均勻分布,男患者中有吸煙史的~70%
本帖於 2020-02-12 11:43:43 時間, 由普通用戶 40er 編輯
WENXUECITY.COM does not represent or guarantee the truthfulness, accuracy, or reliability of any of communications posted by other users.
Copyright ©1998-2025 wenxuecity.com All rights reserved. Privacy Statement & Terms of Use & User Privacy Protection Policy