胃溃疡好发于:()
A.胃底部
B.胃体部
C.胃窦部小弯侧
D.胃窦部大弯侧
E.幽门部
参考答案:C
We haven't got any food at the moment. [ ]
A. now
B. later
C. before
D. at that moment
下列化学用语与含义不相符的是
A.AlCl3—氯化铝
B.钙离子—Ca2+
C.2个氧元素—2O
D.2个水分子—2H2O