做到 ______是企业生存的最基本条件。

下列哪种药物为Ⅰa类抗心律失常药（）

A.奎尼丁

B.胺碘酮

C.阿替洛尔

D.心律平

E.维拉帕米

Tony will never forget the days _____ he lived in China with his mother,_____ has a great effect on his life.[ ]

A. that ; which

B. when ; which

C. which ; that

D. when ; that

淋巴细胞占白细胞总数的

A．0～1%
B．0.5%～5%
C．3%～8%
D．20%～40%
E．50%～70%

种子园

经络系统中具有离入出合特点的是（）

A.十二经筋

B.十二经别

C.十二皮部

D.十二正经

E.十五络脉