馈线进入机房前应有防水弯，弯曲半径应大于或等于馈线外径的（）倍。
A.10
B.15
C.20
D.25
参考答案：C
144. The reason why the two _____ cannot speak _____ language is that they were born in America and were brought up in a Japanese family.
A．Germans; German
B．Germen; the German
C．Germen; German
D．Germans; the German
肝硬化腹水产生的最主要因素（）
A.白蛋白合成不足
B.门脉压力增高
C.血氨产生过多
D.便秘
E.脾大，脾功能亢进
