This shirt is very cheap. I'll ______ it. [ ]
A. bring
B. take
C. want
D. believe
答案:B
在等差数列{an}中,a1=3,a3=2,则此数列的前10项之和S10等于[ ]
A.55.5
B.7.5
C.75
D.﹣15
EPA的全名是:()。