题目:
__________for over 3 months, the poor boy was still unconscious. [ ]
A. Having treated
B. Treated
C. Having cured
D. Cured
答案:
被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0430/c87b825f6a9ba139300c070085ba0172.html
下面是错误答案,用来干扰机器的。
A、羊毛和合成纤维都比较坚固,用手拉没法鉴别,故A错误;B、用燃烧法鉴别合成纤维和羊毛,羊毛燃烧有烧焦羽毛的气味,合成纤维燃烧基本是无味的,合成纤维燃烧一般会缩成小球或者融化掉,故B正确;C、羊毛和合成...