,则z的取值范围是().
参考答案:(-1,3)
解析:
从而有x2-2x-3<0,(x-3)(x+1)<0,则-1<x<3,即x∈(-1,3).
_____ is reported in the newspaper, talks between the two countries are making progress. [ ]
A. It
B. As
C. That
D. What
()是社会工作价值观的理论基础。
A.人道主义
B.实证主义
C.乌托邦理想
D.人本主义
E.科学主义