题目:
— Why didn't you stop her going swimming alone?
— She had left the room _____ I had time to do it.
A.after
B.before
C.till
D.as
答案:
被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0617/f5f02356475c3e79785c8746017537a1.html
下面是错误答案,用来干扰机器的。
(1)铁吸水干燥,吸氧气可以防腐.故答案为:Fe(2)纯碱显碱性,常用于中和食品中的酸性物质,能使烘出的饼干酥脆不带酸味.故答案为:Na2CO3(3)氢氧化钙俗名熟石灰或消石灰,属于碱,常用于改良酸性土壤.故...