若曲线y＝ax2－ln x在点(1，a)处的切线平行于x轴，则a＝________.
因为y′＝2ax－，
依题意得y′|x＝1＝2a－1＝0，所以a＝.
It is bad _____ for a man to smoke in public places where smoking is not allowed. [ ]
A. method
B. impression
C. behavior
D. attitude
行政监察监督是行政监察机关对公安机关及其人民警察违法违纪行为所实施的监督检查。( )
，.
，.