心肌兴奋性变化的特点是()
A.绝对不应期短
B.有效不应期特别长
C.相对不应期短
D.超常期特别长
E.低常期特别长
参考答案:B
血细胞计数仪进行白细胞分类计数可否代替显微镜涂片分类?
The suit ____ to young people, particularly those who are slaves of fashion. [ ]
A. appeals
B. subscribes
C. addicts
D. devotes