奴隶社会和封建社会道德的突出特征是（）
A、自发性与外在性
B、纯朴性与野蛮性
C、阶级性和等级性
D、直观性与狭隘性
参考答案：C
The glass door have taken the place of the wooden ones at the entrance, _____ in the natural light during the day.
A．to let
B．letting
C．let
D．having let
国际抗癌协会TNM法对Ⅲ期乳腺癌描述下列哪项是错误的（）.
A．任何TN3MO
B．T3N1～2M0
C．T0～2N2M0
D．T3NOM0
E．T4任何NM0
