我国纬度最低的一组山脉是[ ]
A．大兴安岭和阿尔泰山
B．贺兰山脉和喜马拉雅山脉
C．巫山和南岭
D．冈底斯山和巴颜喀拉山
答案：C
测量长度的基本工具是______；实验室里测量质量用______；量筒可以用来测量物体的______．
—Why didn’t you tell him the meeting?
—He rushed out of the room____I could say a word.[ ]
A. before
B. until
C. when
D. after
