单选题:According to the author, at a big party, small talk is used

题目内容:
According to the author, at a big party, small talk is used with the purpose of__________. A.making both others and yourself feel at ease
B.excluding those you don't like from joining you
C.keeping your voice low so only your friends can hear you
D.comforting those who feel lonely
参考答案:
答案解析:

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爆炸极限,是指对于可燃气体、液体蒸气和粉尘等不同形态的物质,通常以与空气混合后的体积分数或单位体积中的质量等来表示遇火源会发生爆炸的最高或最低的(  )范围。A

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