—"What's the matter? You don't look very
题型：选择题
问题：
—"What's the matter? You don't look very today."
—"I'm tired and I have a lot of ." [ ]
A. good; headache
B. better; headaches
C. well; headaches
D. happy; headache
题型：选择题
火星探测项目是我国继神舟载人航天工程、嫦娥探月工程之后又一个重大太空探索项目。假设火星探测器在火星表面附近圆形轨道运行的周期为T1，神舟飞船在地球表面附近的圆形轨道运行周期为T2，火星质量与地球质量之比为p，火星半径与地球半径之比为q，则T1与T2之比为[ ]
A．
B．
C．
D．
