下列有关复合风管材料的叙述正确的有( )。 A．铝箔复合发泡保

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问题多项选择题

下列有关复合风管材料的叙述正确的有( )。

A．铝箔复合发泡保温板材料为阻燃或难燃材料

B．铝箔胶带的氧指数不小于30

C．铝箔复合发泡保温板材为64kg/m³

D．玻璃纤维布复合铝箔的氧指数不小于60

E．铝箔复合保温风管的板材为内外两层，分别由60μm、80μm或200μm的铝箔，中间的发泡聚氨酯黏合而成的

答案

参考答案：A,B,D

改错题

短文改错。

It was my 18th birthday yesterday. As the age is special for our teenagers, so my parents held a

birthday party for me at home. With my parents and some of my good friends attend my birthday party,

I really had unforgettable experience. We sang songs, dancing and played games together. We all

enjoyed ourselves very much. During the party, my parent told me that from then on I was no longer a

child and an adult. They also said I should be more independent and responsibly. Hearing their words, I

was greatly encouraged. It was just in that moment when I felt I was a grown-up.

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判断题

流通加工能有效衔接干线运输与支线运输，促进两种运输形式的合理化。