某品牌的碳酸氢铵（NH4HCO3俗名碳铵）化肥包装袋上印有如图标识．对该化肥的有关判断错误的是（ ）
A．农作物施用碳酸氢铵后叶色浓绿，生长茂盛
B．碳酸氢铵是一种复合肥料
C．碳酸氢铵保存时应注意防潮
D．50kg碳酸氢铵里氮元素的质量≥8kg
A、氮肥的作用就是使植物叶色浓绿，生长茂盛，故A正确；
B、碳酸氢铵中含有氮元素，属于氮肥，故B错误；
C、碳酸氢铵的化学性质不稳定易分解，碳铵保存时应注意防潮，故C正确；
D、碳铵里的含氮量是指氮元素的质量分数，根据
×100%×50Kg，可知50Kg碳酸氢铵里氮元素的质量≥8kg，故D正确．氮元素的质量 碳酸氢铵的质量
故选B
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| You may not realize it, but you are doing much more than just studying when you are at school. School is also the place 1 you socialize and learn to get along with people. But this is 2 easy. What can you do 3 you just don't like one of your classmates? If you discover that you have problems 4 your classmates or friends, the most important thing to learn is tolerance. Tolerance is the 5 to recognize and respect the 6 in others. We cannot change the way that other people act, 7 it is important to learn to live happily with them. Practicing tolerance will allow everyone to form better 8 with each other. Getting to know someone 9 help you understand why they do things 10 from you. It is important to remember that just because something is different does not mean that it is bad. 11 teaches us to keep an even temper and open mind. One thing to 12 is the old saying, "Treat others how you want 13 ". You would like to be treated kindly by your classmates, so it is 14 to treat them with equal kindness. If you tolerate 15 it does not mean that you have to like it. No one is asking you to 16 who you are or what you believe in. Tolerance just means that you will be 17 of the differences in others and not try to make them change. It is important to 18 tolerance because it will make everyone's lives easier. Learn to 19 people for their different abilities and interests. The world is a very 20 place, and practicing tolerance in your own school and city can help make a difference. | ||||
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