Vitamins are complex ________ that the body requires in very small amounts .

A．) matters              B) materials             C) particles                D) substances

 

[单选题]____________[A] complex[B] comprehensive[C] complementary[D] compensating

[单选题]A． complex B comprehensive C complementary D compensating

[名词解释] junctional complex

[名词解释] 脂溶性维生素（lipid vitamins）

[名词解释] MAC（membrane attack complex）

[名词解释] 复合物Ⅲ(complex Ⅲ)

[名词解释] 复合物Ⅳ(complex Ⅳ)

[名词解释] 复合物Ⅱ(complex Ⅱ)

[名词解释] 水溶性维生素（water-soluble vitamins）

[单选题] Computer（75） is a complex consisting of two or more connected computing units, it is used for the purpose of data communication and resource sharing.（75）A. storage B. device C. network D. processor