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【单选题】
粉尘爆炸是一个瞬间的连锁反应，属于不稳定的气固二反应，与气体爆炸相比，下列关于粉尘爆炸速度、燃烧时间、能量、破坏程度的说法中，正确的是()。A.
粉尘爆炸速度比气体爆炸小，但燃烧时间长，产生的能力大，破坏程度大
B.
粉尘爆炸速度比气体爆炸大，但燃烧时间长，产生的能力大，破坏程度大
C.
粉尘爆炸速度比气体爆炸小，但燃烧时间短，产生的能力大，破坏程度大
D.
粉尘爆炸速度比气体爆炸大，但燃烧时间短，产生的能力大，破坏程度大
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【简答题】翻译以下企业介绍 Early flights , hotel accommodation and much more when you stay at China Hotel by Marriott . The China Hotel in Guangzhou now has a new name - - - - China Hotel by Marriott . A name which say...
【多选题】When you don't understand what the guest says and ask the guest to repeat you may say
A.
Pardon, please. I'm afraid I didn't follow you.
B.
Would you mind repeating a little more slowly?
C.
I beg your pardon?
D.
Would you mind using simpler words?
【单选题】. When the host proposes a toast t his guest, he often says, “_____”.
A.
Bottoms up
B.
Bottom up
C.
Empty cups
D.
Finish drink
【单选题】When the host proposes a toast t his guest, he often says, “__________”.
A.
Bottoms up
B.
Bottom up
C.
Empty cups
D.
Finish drink
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