开关、插座和照明器靠近可燃物时,应采取隔热、散热等保护措施。卤钨灯和超过()的白炽灯 发布时间:2017-03-07 16:10 │ 来源:www.tikuol.com 题型:单项选择题 问题: 开关、插座和照明器靠近可燃物时,应采取隔热、散热等保护措施。卤钨灯和超过()的白炽灯泡的吸顶灯、槽灯、嵌入式灯的引入线应采取保护措施。A.60WB.100WC.150WD.200W
题型:单项选择题 根据句意及首字母提示补全单词。1. This shirt is very e_____. I can't afford it.2. I want to c_____ one from many products.3. Books and a_____ can help you learn English at home.4.If you pass the f_____ examination,we will give you a present.5. Please do not m_____ cash. Please pay for courses by cheque.6. English is the language of i_____ business.7. Our program has three c_____ in business English.8.Harvard is a f_____ university in the USA. 查看答案
题型:单项选择题 HIV致病的关键因素是()A.HIV基因组的活化B.因各种类型的机会感染而致死C.gp120易变异,逃避免疫攻击D.侵犯各种免疫细胞,造成严重的免疫缺陷E.发生各种肿瘤而致死 查看答案
题型:单项选择题 关于外周血嗜酸性粒细胞计数参考范围和生理性变化的叙述,错误的是()A.成人(0.05~0.5)×109/LB.<5岁:(0~0.8)×109/LC.5~15岁:(0~0.5)×109/LD.休息时低,活动后增高E.宜在早晨8时测定 查看答案