急性感染（）
A.病程在1周内
B.病程在3周内
C.病程在2个月内
D.病程超过2个月
E.病程在3周到2个月内
参考答案：B
I was very busy that day. Otherwise I _________in the discussion．
A．would take party
B．had taken part
C．took part
D．would have taken part
一个长方体的底面是边长为4厘米的正方形，高是7厘米，这个长方体的体积是（ ）立方厘米。
