矿井通风阻力与等积孔是反映矿井通风难易程度的指标。
参考答案：对
-He made an apology________be blamed________what he had done.
-It’s really wise of him. [ ]
A．so as to not；of
B．in order not to；for
C．as to not so；for
D．in order not to；of
“所谓大国，就是比小国领土较大、人口较多的国家，而小国就是比大国领土较小、人口较少的国家。”这一定义所犯的逻辑错误是（）
A.循环定义
B.定义过窄
C.定义过宽
D.同语反复
