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

表达式complex(a,b)的功能为()A. 返回为复数的模B. 以a为实部,b为虚部创建复数C. 返回为复数的虚部D. 返回复数z的共轭复数

[名词解释] junctional complex

[名词解释] 脂溶性维生素（lipid vitamins）

Researchers often need to collaborate on complex projects to draw on diverse exp

Researchers often need to collaborate on complex projects to draw on diverse exp

Milk is a very _______ food，containing protein，vitamins and minerals.（ ）A. nutri

[名词解释] 水溶性维生素（water-soluble vitamins）

[名词解释] MAC（membrane attack complex）