已知：①Na3N＋3H2O＝3NaOH＋NH3↑，②NaH＋H2O＝NaOH＋H2↑。下列叙述正确的是
A．离子半径：Na+＞N3-＞H+
B．反应①和②都是氧化还原反应
C．反应②每生成1 mol H2，转移的电子数为NA
D．Na3N和NaH与盐酸反应都只生成一种盐
答案：C
题目分析：A、离子的核外电子层数越多离子半径越大。在核外电子排布相同的条件下原子序数越大，离子半径越小，则．离子半径：N3-＞Na+＞H+，A不正确；B、有元素化合价发生变化的反应是氧化还原反应，在反应①中元素的化合价均不变化，不是氧化还原反应。反应②中氢元素的化合价发生变化，属于氧化还原反应，B不正确；C、反应②中氢元素的化合价分别从NaH中－1价和水中+1价变化到0价，注意1个电子，所以反应②每生成1 mol H2，转移的电子数为NA，C正确；D、根据反应①可知Na3N与盐酸反应生成氯化钠和氯化铵两种盐，D不正确，答案选C。
The ability to forgive others is a great thing that can certainly help to make life happier for everyone. However, some people think that it is very 1 to do, and they don’t know how to forgive others, especially their family and friends. This is all because they don’t understand the meaning of “forgiveness”. In the dictionary, “to forgive” means “to 2 feeling angry with somebody that has done something bad to you.” I’m happy that many people have 3 in doing this. I have succeeded, too, and I know how hard it is. I lived with a friend for two years. During that time, he did cause me many 4 . I easily got angry when communicating with him. However, we 5 had a talk about our problems. When he pointed out (指出) that I wasn’t treating him like a friend, I was 6 . I never knew that I also needed to be forgiven for doing something wrong. I thought however 7 I might get, I did love my friend deep in my heart. Then I understood the saying, “To love is to forgive.” And when we 8 each other, we feel great. After that long talk, we both 9 those bad moments. Our friendship became fresh again. Now I understand the 10 of forgiveness better.
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