低排高阻型休克选用：（）
A.缩血管药
B.扩血管药
C.肝素
D.盐皮质激素
E.糖皮质激素
参考答案：B
While he has failed again and again, he never gives up in order to _____ his dream. [ ]
A. achieve
B. awake
C. admit
D. control
Access的报表要实现排序和分组统计操作，应通过设置______属性来进行。
