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【判断题】
缓冲溶液就是能抵抗外来酸碱影响，保持pH值绝对不变的溶液。 ( )A.
正确
B.
错误
拍照语音搜题，微信中搜索"皮皮学"使用
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参考解析：
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皮皮学刷刷变学霸
举一反三
【单选题】I did not attend the lecture by Prof. Jackson. I ____ but I ____ all this morning.
A.
would, have washed
B.
could, have been washing
C.
would have, have been washing
D.
could have, had washing
【单选题】I did not attend the lecture by Pro. Jackson. I ____ but I ____ all this morning. 2011
A.
would,have washed
B.
could,have been washing
C.
would have,have been washing
D.
could have,had washing
【单选题】I did not attend the lecture by Pro. Jackson. I ____ but I ____ all this morning.
A.
would; have washed
B.
could; have been washing
C.
would have; have been washing
D.
could have; had washed
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