某地公安局由于综合治理社会治安抓得好,该辖区已数年未发生重大刑事案件。该公安效益属于( )
A.事后效益
B.宏观效益
C.直接效益
D.长期效益
参考答案:D
– Will you please go to see the movie Guanyinshan with me?
– No, I won’t. I it already.
A. saw B. have seen C. see
如果x2+3x-1的值是4,则代数式2x2+6x+5的值是 ______.