题目内容

33. This study has found some key factors _______employees' stress in their work.

A. turning down
B. leading to
C. taking off
D. carrying out

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34. The company can now focus its attention __________developing its latest car model.

A. in
B. with
C. at
D. on

下述哪种因子不存在于血浆中

A. V因子
B. Ⅲ因子
C. X因子
D. Ⅻ因子
E. Ⅶ因子

血清与血浆的主要区别在于血清缺乏

A. 纤维蛋白
B. 纤维蛋白原
C. 球蛋白
D. 血小板
E. 红细胞

能使纤维蛋白降解物质是

A. 肝素
B. 凝血酶
C. 纤溶酶
D. 纤溶酶原
E. 抗凝血酶Ⅲ