When under maneuvering conditions with the machinery being manually operated the control unit or console should be

A．automatically controlled

B．continuously manned

C．off power

D．continuously unmanned

[单选题]When a firm operates under conditions of pure competition, marginal revenue

[单选题]Under normal conditions a liferaft is released from itscradle by（）.A . cutting the restraining strapB . unscrewing the turnbuckle on the back of the cradleC . lifting one end of the raftD . pushing the plunger on the center of the hydrostatic release

[单选题]Their parents oncelived under very [severe] conditions.A.tightB. strictC. h

[单选题]They have beenliving under the most [appalling] conditions for two years.A.

[单选题]They have beenliving under the most [appalling] conditions for two years.A.

[单选题]Under which of the following conditions are market values of securities mos

[单选题]Under what financial market conditions can active portfolio management outp

[判断题]When the goods are imported under CIF， the buyershould not pay the freight.

[判断题]When the goods are imported under CIF， the buyershould not pay the freight.

[单选题]Even when __________ to such tough living conditions, the children would ne