题目

We’ve been told the good news , but when and where to go for the exciting paid vacation______yet.      A.are not discussedB.have not been discussed C.is not being discussedD.has not been discussed 答案：D3．下列说法正确的（　　）A．穿着化纤服装的人在晚上脱衣服时，常常会看见闪光并伴有轻微的“噼啪”声，这是由于摩擦起电所造成的现象B．把冰箱压缩机涂黑，是为了增加能量辐射C．发现电线起火，应快速拉下开关，切断电源D．发现电线起火，正确的方法是用水扑灭