宋代最初的钞币——交子产生于（）。
A、河南
B、陕西
C、浙江
D、四川
参考答案：D
粪便呈黑色，无光泽，隐血试验阴性，见于
A．痉挛性便秘
B．服用铋剂
C．肠蠕动亢进
D．消化不良
E．钡餐造影后
The nurse is interviewing a client about his medical history. Which preexisting condition may lead the nurse to suspect that a client has colorectal cancer
A．Duodenal ulcers.
B．Hemorrhoids.
C．Weight gain.
D．Polyps.
