肺胀晚期，主要病变的脏腑是（）
A.肺、脾、肾
B.肺、脾、心
C.肺、肾、心
D.脾、肾、心
E.肺、肝、肾
参考答案：C
Recently Peter________to do his homework, and instead insists on wasting his time playing com-puter games, which extremely annoys his father.
A．had been refusing
B．has been refusing
C．was refusing
D．refused
原核生物DNA复制过程中负责引物合成的蛋白是（）。
A.DnaA
B.DnaB
C.DnaC
D.DnaG
E.SSB
