气性坏疽的病原菌主要侵犯（）
A．皮下脂肪组织
B．筋膜蜂窝组织
C．肌肉组织
D．骨与关节
E．伤处附近所有软组织
参考答案：C
On the number line above, the segment from 0 to 1 has been divided into fifths, as indicated by the large tick marks, and also into sevenths, as indicated by the small tick marks. What is the least possible distance between any two of the tick marks ？（）
A.A
B.B
C.C
D.D
E.E
东欧剧变和苏联解体改变了世界两级格局，世界格局呈现出美国，俄罗斯，欧盟，中国和日本等多极格局
