题目

山脉是地形的骨架。下面哪条山脉两侧分别为黄土高原与华北平原（ ） A . 大兴安岭 B . 太行山 C . 南岭 D . 巫山 答案：B－Would you like some more cakes?－I've had enough. ________. [　　] A．OK, pleaseB．Thanks all the same C．Yes, pleaseD．Thanks for your help