观察指标的合理性是指所选择的观察指标是否既能反映(),又能反映所研究问题的()。
参考答案:客观现象;本质
He was all but killed by the traffic accident, which I think happened ____ no accident. [ ]
A. in
B. by
C. at
D. for
经济发展新常态的形势下,要进一步促进经济发展,就得在充分发挥市场决定作用的前提下,引导政府用好职权。