---- Housing prices are likely to stop rising because the governments at all levels ______a combination blow(组合拳) to the real-hot property markets.

---- Really good news!

A．gave

B．gives

C．have been giving

D．are giving

电气设备的绝缘应能长时间承受电气、机械、化学、热力以及生物等有害因素的影响而不失效。