不能经垂直感染的病毒是
A．脊髓灰质炎病毒
B．巨细胞病毒
C．乙型肝炎病毒
D．风疹病毒
E．单纯疱疹病毒
参考答案：A
The door is not ________ for the elephant to pass.[ ]
A. wide enough
B. widely enough
C. enough wide
D. enough widely
破产和解
