题目

Because the children keep interrupting her whenever she reads a book, she is always _____ her place. A. loosing B. missing C. losing  D. looking for 答案:C 解析: lose one's place意为读书时“找不到读到哪儿”。类似的习语有:lose heart(灰心,泄气),lose one's heart to sb. (爱上某人),lose one's head(惊慌失措),lose one's hold on(or over)(失去对......的控制),lose one's temper(发脾气),lose one's tongue (紧张得不知说什么好),lose one's way (迷路),lose sight of(看不见了),lose one's never(失去勇已知溴乙烷跟氰化钠反应再水解可以得到丙酸: 产物分子比原化合物分子多了一个碳原子,增长了碳链。 请根据以下框图回答问题(又已知F分子中含有8个原子组成的环状结构): (1)反应①②③中属于取代反应的是________(填反应代号) (2)写出结构简式:E________,F________
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