阅读下面短文，根据短文内容判断句子的正误。正确的涂“A”，错误的涂“B”。（共5小题，每小题2分，计10分）

Long long ago, there was a girl called Nuwa. Her father was Emperor(皇帝) Yan and he loved her very much. They often played together, and she also loved her father very much. One day, she had a wonderful time. Then she swam in the sea. She was too tired to swim and she was drowned(淹死). Because she wanted to see her father then she changed into(变成) a bird. She put some stones(石头) into the sea day after day and changed the sea into the land. She made a wish, and she would like to play with her father again.

This story was a little sad. It tells something important. When we do anything, we have to work hard. Learning English is difficult but if you study hard, you can learn it well.

小题1: Emperor Yan didn’t love her daughter at all.

小题2:Nuwa put some stones into the sea when she changed into a bird.

小题3: Nuwa was too tired to swim and she was drowned.

小题4: The meaning of “land” is “操场”.

小题5:When we do anything, we don’t have to work hard.

设N_A是阿伏加德罗常数的数值，下列说法正确的是    [ ]

A．常温下，23 g NO₂含有N_A个氧原子    

B．1 mol Cl₂与足量的铁反应，转移的电子数为3N_A    

C．0.1 mol²⁴Mg³²S晶体中所含中子总数为2.8 N_A    

D．用惰性电极电解硫酸铜溶液，若生成1 mol O₂，则转移电子数为2N_A