远距T射线放射治疗设备照射室面积一般不应小于多少平方米（）。
A.50
B.40
C.30
D.20
E.10
参考答案：C
A strange girl entered the room and told me a story of her own, _____ I suspected the truth.
A．that
B．which
C．of which
D．at which
“能行五者于天下为仁矣”，试问是哪五者？（）
