问题
选择题
My friend Martin was very sick with a strange fever; _______, he could neither eat nor sleep. [ ]
A. as a result
B. after all
C. any way
D. otherwise
答案
答案:A
My friend Martin was very sick with a strange fever; _______, he could neither eat nor sleep. [ ]
A. as a result
B. after all
C. any way
D. otherwise
答案:A
填写下表,用化学方法除去混合物中的杂质(“混合物”栏中括号内为杂质).
题号 | 混合物 | 除去杂质的化学方程式 |
(1) | 铜粉(Fe) | ______ |
(2) | FeCl2粉末(CuCl2) | ______ |
(3) | KCl粉末(KClO3) | ______ |
(4) | N2气体(O2) | ______ |