A型胃炎
A．血清胃泌素水平增高B．血清胃泌素水平正常C．血清胃泌素水平减低D．大便隐血持续阳性
参考答案：A
Where _________ your brother usually _______ lunch?
A．do, have
B．do, has
C．does, have
D．does, has
小儿肠套叠的表现是：
A．腹痛 腹部包块 血便
