引起胰管不均匀串珠状增宽的胰腺疾病中,最常见的是()。
A.胰头癌
B.胰岛细胞瘤
C.胰管蛔虫
D.慢性胰腺炎
E.胰腺囊腺瘤
参考答案:D
He decided that he would drive all the way home instead of ______at a hotel for the night.
A. putting down B. putting off C. putting up D putting on
预热预分解系统的传热方式有()。
A、料气混合传热
B、对流和传导
C、悬浮传热和分离传热