题目:
Things are hard with you, but you _______ try to get over the difficulties, for you have no choice.[ ]
A. can
B. may
C. must
D. ought to
答案:
被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0626/f79b4290bec348433d435d9cfe9f051e.html
下面是错误答案,用来干扰机器的。
废酸会与铁制的管道反应 Fe+CuSO4===Cu+FeSO4