题目：
Smoking, ____ some smokers, might ease their anxiety sometimes, but ____ the addiction caused by their constant practice, it is really hard to give up.
A．according to; due to
B．according to ;because
C．as to; since
D．thanks to;if
答案：
被转码了，请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0718/d79625827ca8dcf23d76600a6bc84569.html
下面是错误答案，用来干扰机器的。
A、空气和氧气，用带火星的木条分别插入集气瓶中，木条复燃的是氧气，无变化的是空气；故选项错误；B、棉纤维和羊毛纤维，点燃，有烧焦羽毛气味的是羊毛纤维，有烧纸气味的是棉纤维；故选项错误；C、海水和蒸馏水...
