【单选题】等差数列{a n }中,a 10 <0,a 11 >0且a 11 >|a 10 |,S n 为其前n项和,则( )
A.
S 1 ,S 2 ,…,S 10 都小于0,S 11 ,S 12 ,…都大于0
B.
S 1 ,S 2 ,…,S 19 都小于0,S 20 ,S 21 ,…都大于0
C.
S 1 ,S 2 ,…,S 5 都小于0,S 6 ,S 7 ,…都大于0
D.
S 1 ,S 2 ,…,S 20 都小于0,S 21 ,S 22 ,…都大于0
【简答题】●算法指的是 (14) 。 (14) A.计算机程序 B.解决问题的计算方法 B.排序算法 D.解决问题的有限运算序列
【单选题】Which of the following statements about Greece is INCORRECT?
A.
It gets an almost $400 billion's debt.
B.
It has already got more than $50 billion's bailout.
C.
Greek workers protest against some of the cutting spending plans.
D.
It was not the only country whose investment ratings went down.
【简答题】等差数列{a n }中,S n 是其前n项和,a 1 =-11, S 10 10 - S 8 8 =2,则S 11 =______.
【单选题】会计人员陈某认为,会计工作只是记记账、算算账、与单位经营决策关系不大.没有必要要求会计人员“叁加管理”。陈某的观点是正确的。( )