()不仅会使电气设备进一步损坏,形成短路事故,而且还可能导致人身触电和瓦斯、煤尘爆炸危险。
A、过流
B、短路
C、漏电
参考答案:C
—What were you doing when she dropped in?
—I for a while and_________ some reading.
A.was playing; was going to do
B.played; did
C.had played; was going to do
D.had played; did
在验光时,以避免调节因素对屈光造成的影响,对7岁以下的斜视弱视患者可用()阿托品药膏涂眼散瞳