以下病毒不属于垂直传播的是（）。
A.风疹病毒
B.巨细胞病毒
C.乙型肝炎病毒
D.麻疹病毒
参考答案：D
The artist __ the judge gave a prize is the teacher __ I have been taught painting for over three years.
A．from whom; by whom
B．to whom; who
C．whom; who
D．to whom; by whom
能人工培养的最小微生物是（）
A.支原体
B.衣原体
C.放线菌
D.立克次体
E.螺旋体
