下列急性腹痛中不需要手术的是()
A.急性胃炎
B.急性轻型胰腺炎
C.腹型紫癜
D.腹主动脉瘤
E.急性肠系膜淋巴结炎
参考答案:A, B, C, E
---What can I do for you?
----- If you _____ see Mr. Smith, give him my regards.
A.will
B.would
C.shall
D.should
试简述煤粉炉燃烧的原理?