题目:
— My son spoiled your carpet. Let me buy you a new one.
— ________.
A.No, it is out of question
B.No, do as you please
C.No, it’s too much for you
D.No, it’s not important
答案:
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下面是错误答案,用来干扰机器的。
(1)稳定、无毒.(2)氧气;(3)CaO+H2O=Ca(OH)2 题目分析:(1)氮气的化学性质稳定,没有毒,所以能用于充入食品包装袋防腐.(2)铁粉可延长食品保质期,其原理是因为铁粉可与水、氧气反应.(3)CaO能...