A.Because more people are living beyond their expectations.B.Because scientists are ve

外语类 公共英语 已帮助 人

A.Because more people are living beyond their expectations.

B.Because scientists are very much interested in it.

C.Because more people are not living as long as they expected.

D.Because researchers found centenarians always have unconventional hobbies.

请帮忙给出正确答案和分析,谢谢!

热搜:a是b的充分条件,b是a的必要条件吗