不能利用脂肪酸的组织是（）
A.肝脏
B.肾脏
C.肌肉
D.脑组织
E.心肌
参考答案：D
—Excuse me. Is there a bookshop in the neighborhood?
—Yes, there is. It's ______ the post office and the hotel. [ ]
A. on
B. between
C. across
D. next
理想肿瘤标志物的条件是什么？
