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【简答题】
请把下面句子改成过去时态。 1. We fight against virus, doubts, and uncertainty. 2. The doctors and nurses work day and night no matter how exhausted they are. 3. Some lose their jobs. 4. Some can't pay their rent and bills. 5. Some people don't have chance to say goodbye to their families. 6. We try best to fight against fear, uncertainty and doubts.
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举一反三
【单选题】Reading Chicken Soup for the Soul may be _____, but it is very rewarding, especially for your cloze test.
A.
time-spending
B.
time-consuming
C.
enjoyable
D.
remarkable
【单选题】在火焰原子吸收光谱中 , 测定元素铝宜选用( )火焰。
A.
空气 - 乙炔富燃
B.
空气 - 乙炔贫燃
C.
N 2 O-C 2 H 4 富燃
D.
N 2 O-C 2 H 4 贫燃
【简答题】Cloze
【简答题】“民为贵，社稷为重，() ”是思想家孟子对春秋以来民为本思想的高度概括。