【单选题】已知x≥y,当a≤0时,下列不等式成立的是( )
【单选题】Which of the following is Browns finding?
A.
People should choose a sleep pattern and work according to the pattern.
B.
Regular changes between day shifts and the night ones do good to workers.
C.
Permanent night workers suffer no disturbed sleep or other disorders.
D.
Workers act abnormally when they work on night shift every day.
【单选题】已知x=y,下列等式不一定成立的是( )
【简答题】已知ax=ay,则下列结论错误的是( ) A.x=y B.b+ax=b+ay C.ax-x=ay-x D. ax π = by π
【单选题】已知 x > y , ax < ay ,则( )
【判断题】《大清律例》正式颁布后,律文不再增删,通过不断修例来适应社会的发展,并形成了附例“五年一小修,十年一大修”的传统。