正常照明断电时投入运行的应急照明,不能选用( )作为光源。A.白炽灯 B.卤钨灯 发布时间:2017-06-08 08:05 │ 来源:www.tikuol.com 题型:单项选择题 问题: 正常照明断电时投入运行的应急照明,不能选用( )作为光源。A.白炽灯B.卤钨灯C.冷阴极荧光灯D.金卤灯
题型:单项选择题 I'm glad to get together to offer our ____ our homeland's success ____ competition.A. congratulation on; for B. congratulations on; in C. congratulation on; in D. congratulations on; for 查看答案
题型:单项选择题 (32—34题共用题干)患者,女,35岁,因“右耳听力下降一年余”就诊,有耳呜,无明显耳闷,偶有眩晕,检查鼓室图示双耳As型,传导性听力下降。经检查患者电测听存在卡哈切迹,这是指哪个频段听力接近正常A.500HzB.1000Hz C.2000HzD.3000Hz E.4000Hz 查看答案