我们吃的面粉主要来自于小麦种子的[ ]
A.胚乳
B.子叶
C.胚芽
D.胚轴
A
Out of the 325 million laborers in the Middle East and North Africa, 63 percent are women and 32 percent university students.
精馏塔进料组成变化不会造成塔顶分析不合格。