外科化脓性感染中最常见的致病菌为
A.葡萄球菌、克雷伯菌B.大肠埃希菌、类杆菌C.葡萄球菌、大肠埃希菌D.链球菌、类杆菌E.变形杆菌、克雷伯菌
参考答案:C
Attempts have been made for nearly three decades to increase the amount of precipitation from clouds by seeding them with salt or silver iodide.
A.Devices
B.Hypotheses
C.Efforts
D.Suggestions
标点符号的作用,不包括()。
A.表示停顿
B.表示语气
C.表示词语的性质和作用
D.表示词义