【单选题】【消耗次数:1】
设置有遮光罩的双丝灯泡, 遮光罩应们位于近光灯丝的 ( ).
上方或前方
下方
任意位置;
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相关题目
【判断题】 前照灯的近光灯丝位于反射镜的焦点上,远光灯丝位于焦点的前方
①  正确
②  错误
【单选题】 前照灯灯泡中的近光灯丝应安装在( )。
①  反光镜的焦点处
②  反光镜的焦点上方
③  反光镜的焦点下方
【单选题】 采用双丝灯泡的前照灯,其远光灯丝功率较大,位于反射镜的( ).
①  焦点上
②  圆心上
③  镜面上
【判断题】 在调整光束位置时,对具有双丝灯泡的前照灯,应该以调整近光光束为主。()
①  正确
②  错误
【单选题】 可用作膜剂遮光剂的是( )。
①  聚乙二醇
②  甘油明胶
③  PVA17-88
④  二氧化钛
⑤  碳酸钙
【单选题】 可用作膜剂遮光剂的是()
①  碳酸钙
②  甘油明胶
③  聚乙二醇
④  二氧化钛
⑤  PVA17-88
【单选题】 双托掌的位置位于哪里?
①  鼻子前上方
②  眼睛正前方
③  胸部前方
④  额头的前上方
【单选题】 作为明胶空心胶囊辅料中遮光剂的是()
①  甘油
②  二氧化钛
③  十二烷基磺酸钠
④  对羟基苯甲酸酯类
⑤  山梨醇
【判断题】 线圈的匝与匝间,线圈与屏蔽罩间(有屏蔽罩时),线圈与磁心、 底板间存在的电容均称为分布电容。
①  正确
②  错误
【单选题】 吸收塔中塔板上的泡罩有什么作用?
①  分离天然气中水分
②  是贫甘醇的流动通道
③  将天然气分成细小气流,使其与三甘醇充分接触,促进脱水效率
④  阻挡天然气通过
随机题目
【单选题】 I found the book you recommended in the library, ______ is missing.
①  the front cover of which
②  the front cover of that
③  that front cover
④  of what front cover
【单选题】 Malaysian Airlines lost an airplane on March 8 last year, _____ whereabouts still remains a mystery.
①  its
②  whose
③  their
④  the
【单选题】 Neither John nor his roommates _____ in the dormitory yesterday evening.
①  was
②  were
③  has been
④  had been
【单选题】 _____ you work hard enough _____ you be able to get a PhD degree in three years.
①  Only if, will
②  If only, would
③  Should, will
④  Unless, would
【单选题】 China hosted the Olympic Games in 2008, thus _____ her dream to be recognized as one of the greatest nations in the world.
①  having realized
②  realizing
③  realized
④  to realize
【单选题】 Man is superior to animals ______ he uses language to convey his thoughts.
①  that
②  in that
③  when
④  in which
【单选题】 If it _____ for his help, I wouldn’t be a university student now.
①  hasn’t been
②  hadn’t been
③  wasn’t
④  weren’t
【单选题】 The conference _____ next year will be an important event in the history of the country.
①  having been held
②  being held
③  to be held
④  held
【单选题】 Have a word with the manager ______ if he’s willing to reduce the price.
①  and to see
②  and see
③  and seeing
④  so to see
【单选题】 It is from the earliest times ______ men have studied the world around them with interest.
①  which
②  where
③  how
④  that