______________ is east and south of China. [ ]
A. Canada
B. Australia
答案：B
消化性溃疡最易发生大出血的是
A．胃小弯溃疡
B．幽门管溃疡
C．十二指肠球部溃疡
D．球后溃疡
E．多发性溃疡
防己的横断面显
A．菊花心B．车轮纹C．朱砂点D．大理石样花纹E．云锦纹
