A、满足不孕妇女养育孩子的正当愿望
B、满足代理母亲乐意助人的良好愿望
C、代孕是一种合作生殖
D、代孕可能引起的商业化问题可以通过管理解决
Howmanypartsdoesascienceandtechnologypaperconsistof?Whatarethey?
Havingdecidedtorentaflat,we________contactinghousingagenciesinthecity.
A、setabout
B、setdown
C、setout
D、setup
Iknowmylimitations,soIwon’tdoanything______myability.
A、beyond
B、under
C、above
D、below
In1900,theenergyderivedfromburningpetroleumwasonlyfourpercent______ofcoal.
A、that
B、this
C、what
D、which