The Great Wall winds its way from west to east, _______ deserts, _______mountains and ________valleys, until at last it reaches the sea.

A．across; through; over

B．through; on; across

C．across; along; up

D．across; over; through

21世纪人人享有卫生保健的总体目标不包括()

A.增加期望寿命

B.提高生活质量

C.在国家内部和国家之间改善健康的公平程度

D.卫生系统可持续发展，保证人民利用这一系统所提供的服务

E.健康促进