【单选题】【消耗次数:1】
局部排风系统的槽边吸气罩,槽宽大于?(?????)mm时,宜采用双侧吸气。??
1000?
900??
700?
800??
参考答案:
复制
纠错
相关题目
【单选题】 基槽支护结构的形式宜采用
①  横撑式支撑
②  搅拌桩
③  挡土板
④  非重力式支护结构筑
【单选题】 吸气运动时
①  膈肌收缩,肋间肌舒张
②  膈肌舒张,肋间肌收缩
③  膈肌收缩,肋间肌收缩
④  膈肌舒张,肋间肌舒张
⑤  以上都不对
【判断题】 为了开启方便和少占地方,当门宽大于1000时,通常采用双扇门。
①  正确
②  错误
【单选题】 当用单斗挖掘机开挖基槽时,宜采用的工作装置为()。
①  正铲
②  反铲
③  拉铲
④  抓铲
【单选题】 盲孔时,槽深为槽宽的
①  2~6倍
②  10倍
③  8倍
【判断题】 窗间墙的宽度一般宜大于1000mm
①  正确
②  错误
【单选题】 平静呼吸时,吸气末胸内压
①  等于大气压与胸内压之和
②  高于大气压
③  等于大气压
④  等于肺内压
⑤  低于大气压
【判断题】 关于胸内压,吸气时比呼气时低。
①  正确
②  错误
【单选题】 对于()的基坑(槽)开挖时严禁采用天然冻结施工。
①  A.黏土
②  B.软土
③  C.老黄土
④  D.干燥的砂土
【单选题】 在做吸气训练时首先要保持良好的()
①  放松状态
②  精神状态
③  兴奋状态
随机题目
【单选题】 ______ bad cold she spent the entire day in bed.
①  As if
②  Even though
③  In addition
④  Due to
【单选题】 Modesty helps one to go forward, ______ conceit makes one lag behind.
①  whenever
②  only if
③  whereas
④  consequently
【单选题】 A pen pal provides good motivation for your writing because he or she ____.
①  lives far away from you
②  knows China a lot so that you can have a lot to talk about
③  also keeps a diary
④  may inform you of many interesting things in his or her culture
【单选题】 As for words which do not often occur in everyday situation, you just need to be able to ____.
①  recognize them
②  nod at them
③  concentrate much on them
④  practice using them constantly
【单选题】 According to the text, which of the following is NOT one of the possible activities for you to practice speaking English at school?
①  To talk to native speakers on campus.
②  To speak English to the waitress in English as you pay for a meal in a restaurant.
③  To rehearse aloud by yourself.
④  To talk with your classmates in English.
【单选题】 The place did not seem to be popular, for it was completely deserted, and in any case _____ to traffic.
①  inaccessible
②  inadequate
③  insignificant
④  incompatible
【单选题】 The head of the museum was _____and let us actually examine the ancient manuscripts.
①  promising
②  agreeing
③  pleasing
④  obliging
【单选题】 Lucy,who did not even go to grade school, had no ________of a job at the time.
①  interview
②  pressure
③  prospect
④  application
【单选题】 The lecture provided ____ insight into foreign affairs.
①  penetrating
②  pendular
③  passive
④  penal
【单选题】 Linda is 35 years o1d and, after two close relationships, the prospect of staying single__________ her.
①  impresses
②  depresses
③  threatens
④  stuns