电能计量柜计量单元的电压回路，不得作辅助单元的供电电源。

下列属于五劳的有

A．心劳

B．肝劳

C．脾

D．胃劳

E．肾劳

Unions would like more __________ working hours to replace the nine-to-five, forty-hour week.

A．flexible

B．changing

C．moveable

D．variable

卸油员在卸油现场放置（）个4kg手提式干粉灭火器、（）个35kg推车式干粉灭火器以及足够的石棉毡。

A、1，1

B、1，2

C、2，1

D、2，2

Assume that the expected dividend growth rate (g) for a firm decreased from 5% to zero. Further, assume that the firm's cost of equity (k) and dividend payout ratio will maintain their historic levels. The firm's P/E ratio will most likely:（）

A. become undefined.

B. increase.

C. decrease.

钢筋焊接接头长度区段内是指（）长度范围内，但不得小于500mm。

A.30d 

B.35d  

C.45d