在EPCIS系统中，中级核保人的权限包括代理业务（）范围内的倒签。
A.30天
B.45天
C.60天
D.180天
参考答案：C
The result might not as satisfactory as expected but the ________ on his face told us that he was very happy.
A．expression
B．impression
C．celebration
D．appearance
患者，男，6岁。饮食正常，身体偏瘦，腹部作痛，大便带有白色节片。治疗应首选的药物是（）
A.苦楝皮
B.南瓜子
C.使君子
D.川楝子
E.牵牛子
