题目

I didn’t see your sister at the meeting. If she _____, she would have met my brother. A. has come          B. did come           C. came              D. had come 答案：D 解析: 略肝脏细胞中，含量最多的化合物是（　　）A 肝糖原            B 水             C 胆汁           D 蛋白质