Annie often tells her classmates ______ at the remote school in the mountain area and what she has done there as a volunteer.

A．life is how hard

B．what hard life is

C．how hard life is

D．how hard is life

在我国实施辅助生殖技术，违背卫生部制定的伦理原则的是（）

A.使用捐赠的精子

B.使用亲属代孕

C.使用卵泡浆内单精注射

D.使用捐赠的卵子

E.使用捐赠的胚胎