静脉血栓比动脉血栓常见是因为()。
A.静脉血流缓慢
B.静脉壁薄、容易受压
C.有静脉瓣
D.静脉血液的粘性较大
E.静脉血氧含量较低
参考答案:A, B, C, D
My dictionary . I have looked for everywhere but still it. [ ]
A. has lost; don't find
B. is missing; don't find
C. is losing; haven't found
D. is missing; haven't found
秦始皇被称为“千古一帝”,他为了实现统一和巩固统一采取了许多措施,下列叙述符合史实的是
A.他首创军功爵制,使军队保持旺盛的战斗力
B.他在统一方略上,从弱小的韩国开刀,最后灭赵
C.他发布焚书令,规定除政府外,民间只可收藏有关思想、医学和种植的书
D.他在全国设立36郡,郡下设县,避免国家重新陷入分裂局面