设等差数列{an}的前n项和为Sn,若S2=2,S4=10,则S6=[ ]
A.12
B.18
C.24
D.30
答案:C
Mr. Smith wanted to buy the house and he told me that ____the house cost,it would be worth it. [ ]
A. however
B. how much
C. whatever
D. what
Bell麻痹常见的脑神经损害的表现为()
A.单侧中枢性面神经麻痹
B.单侧周围性面神经麻痹
C.双侧中枢性面神经麻痹
D.双侧周围性面神经麻痹
E.一侧周围性面神经麻痹,对侧偏瘫