根据动物细胞体外培养的生长特性,将体外培养的细胞分为()()()三个类型。
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()细胞由于离体时间短,能较好的反映体内的生长状况,表现出原组织或细胞的特性,经常应用于药物测试和细胞分化研究。
Which of the following swords is inflexible?
A. foil
B. épée
C. sabre
D. foil and sabre
The Olympic event ___ is developed from shooting arrows with a bow.
A. wrestling
B. shooting
C. fencing
D. archery