【多选题】【消耗次数：1】
关于通风空调工程中柔性短管的安装技术要点，说法正确的是().
①
A.防排烟系统的柔性短管必须为不燃材料
②
B.柔性短管应采用透气的柔性材料(不透气)
③
C.柔性短管长度设置为300mm(150-250mm)
④
D.柔性短管与法兰组装宜采用压板铆接连接
参考答案：
复制
纠错
相关题目
【单选题】
柔性基础与刚性基础受力的主要区别是（ ）
①
柔性基础比刚性基础能承受更大的荷载
②
柔性基础只能承受压力，刚性基础既能承受拉力，又能承受压力
③
柔性基础既能承受压力，又能承受拉力，刚性基础只能承受压力
④
刚性基础比柔性基础能承受更大的垃力
【多选题】
提高生产系统的柔性在技术设备方面可采取以下哪些措施（ ）
①
用多品种的可变流水生产取代单一品种流水生产
②
采用柔性制造系统
③
推行标准化措施
④
推行成组技术
⑤
采用VRP
随机题目
【单选题】
I caught a___ of the car before it disappeared around the bend.
①
glance
②
glimpse
③
glare
④
stare
【单选题】
Alice ___her father that both she and her husband would be happy if he would live with them.
①
convinced
②
reinforced
③
pledged
④
required
【单选题】
Never in my wildest dreams ___ these people are living in such poor conditions.
①
I could imagine
②
?could I imagine
③
?I couldn’t imagine
④
?couldn’t I imagine
【单选题】
It was ___ back home after the experiments.
①
not until midnight did he go
②
until midnight that he didn’t go
③
not until midnight that he went
④
until midnight when he didn’t go
【判断题】
Mark often attempts to excape to be fined whenever he breaks traffic regulations.
①
正确
②
错误
【单选题】
The patients believe that the doctor knows exactly how to put them ___.
①
right
②
correct
③
perfect
④
well
【判断题】
It was because he was too clumsy to drive a car that Jim hadnt learned to drive.
①
正确
②
错误
【单选题】
Half of the workers here ___ under 30 ___.
①
is/years
②
are/year old
③
is/years old
④
are/years of age
【单选题】
Nothing but one desk and six chairs ___ in the room.
①
are
②
is stayed
③
is
④
are left