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【简答题】
如果矩阵【图片】 满足【图片】 ，那么称【图片】为（ ）矩阵.
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【简答题】诵读《赠汪伦》,思考这首诗是通过何种意象,怎样送别的?
【简答题】He was indefatigable. When he fixed his eye on his prey he hunted it with the persistence of a botanist who will expose himself to ers of flood, earthquake, fever and hostle natives to find an orc...
【判断题】民族精神赋予中国精神以民族特征，是中华民族的精神独立性得以保持的重要保证；时代精神赋予中国精神以时代内涵，是中国精神引领时代前行、拥有鲜明时代性和强大生命力的重要根源。
A.
正确
B.
错误
【单选题】He was running hard to catch up with the rest of the his team when he fell over his own feet. When he struggled up, he felt his left ankle ______, and found his left hand ______ and his nose _______. ...
A.
spraining; swelling; bleeding
B.
sprained; swollen; bled
C.
spraining; swelling; bled
D.
sprained; swollen; bleeding
【简答题】Combine the following sentences using "even though". It was a hard job. I enjoyed it. It was raining, she went out. I take exercise regularly. I'm still gaining weight. He was wounded. He went on figh...
【简答题】二、将划线部分升级: She went out and her baby was on her back . He came up to her and said," I love you ." She stared at me and smiled . It was raining hard and his clothes were wet through . The guide rushed ...
【单选题】__________is his own decision.
A.
When he leaves
B.
When leaving
C.
When does he leave
D.
He leaves
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