基因芯片是建立在哪种技术的基础之上()
A.核酸分子杂交
B.酵母双杂交
C.免疫印迹
D.EMSA
E.实时PCR
参考答案:A
Much to the couple’s comfort, their income is now double ______ it was five years ago.
A.that
B.than
C.which
D.what
基督教自唐初传入我国,已有2000多年的历史。