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