下列哪项不是湿邪为病的主要表现
A.困重
B.闷胀
C.酸楚
D.无汗
E.舌苔腻浊
参考答案:D
一质点沿直线Ox方向做变速运动,它离开O点的距离x随时间变化的关系为(m),它的速度随时间t变化的关系为(m/s),该质点在t=0到t=2s间的平均速度和t=2s末的瞬时速度的大小分别为( )
A.12m/s,24m/s
B.8m/s,24m/s
C.12m/s,19.5m/s
D.8m/s,13m/s
David Beckham has ______ children. Brooklyn Beckham is his ______ son.
A.third, first,
B.three, one
C.three, first
D.third, one