传染性软疣的病原体是（）
A.HSV
B.VZV
C.HPV
D.MCV
E.柯萨奇病毒
参考答案：D
一 What are you doing now?
— I am writing to my cousin. He moved to America two weeks ago.
He must be ______ receiving my e-mail. [ ]
A. 1istening to
B. 1ooking forward to
C. hoping to
同类照明的几个回路，可穿入同一根管内，但管内导线总数不应多于( )根。
A．4
B．6
C．7
D．8
