机械排烟系统的排烟管道应符合下列（）要求。 A.管道应用非金属

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问题多项选择题

机械排烟系统的排烟管道应符合下列（）要求。

A.管道应用非金属材料制作

B.必须采用不燃材料制作

C.应在其机房人口处设置有当烟气温度超过280℃时能自行关闭的排烟防火阀

D.吊顶内的排烟管道其隔热层应采用难燃材料制作，并应与可燃物保持不小于150mm距离

E.设置防火阀

答案

参考答案：B, C

选择题

近年来，我国先是在农民工队伍中产生全国人大代表，又实行城乡按相同比例选举人大代表等举措，让公民的选举权与被选举权落到实处，这反映了我国人民民主具有（）

①.绝对性 ②.真实性 ③.全民性 ④.广泛性

A．①②

B．②③

C．②④

D．①③

填空题

根据句子意思，写出下列句子括号内所给单词的正确形式。

1. The children often get _______ (noise) in the classroom after class.

2. Sometimes he spends his weekend _______ (fish).

3. Several _______ (foreign) came to visit our school last week.

4. I think the red skirt looks as _______ (good) as the green one.

5. John just got his _______ (driver) license.

6. Look! Mrs Li is there. Let's go and say hello to _______ (she)?

7. My mother often _______ (enjoy) the TV plays in the evening.

8. Talking loudly in a library is very _______ (polite).