急性重症胰腺炎时,淀粉酶持续升高,主要表现为:()。
A.有并发症可能
B.病情稳定
C.病情好转
D.转为慢性
E.可以排除并发症的可能
参考答案:A
His mother _________ a special meal for his birthday. [ ]
A. made
B. have
C. did
D. sat
建筑制图中最常用的是正立面图、侧立面图和平面图,这三个投影图称为三视图。