函数f（x）=x2+（3a+1）x+2a在（-∞，4）上为减函数，则实数a的取值范围是
A.a≤-3
B.a≤3
C.a≤5
D.a=-3
答案：A
将归档文件以件为单位进行装订、分类、排列、编号、编目、装盒，使之有序化的过程称( )。
A．文书立卷 B．案卷编目C．档案管理 D．归档文件整理
Which description about Hilary Clinton is not true according to the passage ().
A.The former First Lady.
B.The front runner of the republic nomination.
C.The front runner of the democratic nomination.
D.New York senator.
