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问题 不定项选择题

下列各选项中所叙述的两个量，前者一定大于后者的是  [     ]

A．1 L0.3 mol·L-1 CH3COOH溶液和3 L0.1 mol·L-1 CH3COOH溶液中的H+数

B．纯水在25℃和80℃时的pH

C．在NH3+ NO→N2+H2O反应中，被氧化和被还原的N原子数

D．相同条件下，H2分别与F2、Cl2反应的反应速率

答案

BD

改错题

Liu Kai is my classmate. He is a good student and always ready to help the others. One day on his way school, he saw a little girl crosses the road. A car was coming towards to her quickly and the girl was so frightened to move. The car near hit her. Just then Liu Kai rushed up to her and caught her on the arm. The little girl was saved. She tells him where she lived, but he took her home. When Liu Kai hurried into the classroom, the teacher has already begun his lessons. He told the teacher why he was late. He was then praised for which he had done.
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单项选择题

具有发热，出疹，全身症状较轻，伴耳后及枕部臖核肿大、左胁下痞块轻度肿大特征的急性传染病的是（）

A.川崎病

B.猩红热

C.幼儿急疹

D.麻疹

E.风疹
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