肥胖病患者在饮食上有三低,是指
A.李东垣B.钱乙C.秦景明D.张景岳E.王清任
参考答案:E
已知等差数列{an}满足:a1=2,点(a4,a6)在直线y=x+6的图象上
(1)求数列{an}的前n项和sn
(2)从集合{a1,a2,a3,…,a10}中任取3个不同的元素,其中奇数的个数记为ξ,求ξ的分布列和期望.
Your IQ tells you how intelligent you are, _____ your EQ tells you how well you use your intelligence. [ ]
A. so
B. for
C. while
D. or