一切为了群众就是要把全心全意为人民服务的思想与履行自己的职责统一起来,一方面有效打击违法犯罪活动,另一方面保障人民群众的权利和利益不受侵犯。( )
参考答案:对
—Listen! Someone is singing in the next room. Who _______ it be? Is it Wei Fang?
—No. It _______ be her. She is at school now.[ ]
A. will; may not
B. must; mustn't
C. may; can't
D. may; won't
若5a3|m|+1+(m+2)b-10是七次二项式,求代数式m2+m的值.