对结肠癌诊断意义最小的是（）
A．大便隐血检查
B．血清CEA
C．直肠指诊
D．钡剂灌肠
E．肠镜活检
参考答案：C
一件衣服，打九折出售是108元，这件衣服原价______元，降低了______元．
There are some tales about dragons ______ ____ __ wings.
A．it; has
B．that; have
C．/; have
D．who; has
