管生产必须管()原则、谁主管谁负责,这是我国安全生产工作长期坚持的一项基本原则。
A、安全
B、事故
C.经营
参考答案:A
下列说法中,不正确的是( )
A.-1的绝对值是1
B.0的平方根是0
C.(-1)0的算术平方根是1
D.(-1)-1的立方根是1
—Honest advice, though unpleasant to the ear, benefits conduct.
—I can’t agree more. _______.
A.A good medicine tastes bitter
B.Good health is above wealth
C.Hope for the best and prepare for the worst
D.Actions speak louder than words