甲醛比色测定时，取待测溶液加乙酰丙酮-醋酸铵溶液，同时另取待测溶液加入不含乙酰丙酮的醋酸铵溶液摇匀，一同置于40℃水浴中加热显色30分钟、冷却。以下解释中错误的是（）
A.严格控制显色温度和时间，防止化妆品中某些组分会受热分解并产生微量甲醛
B.另取待测溶液加入不含乙酰丙酮的醋酸铵溶液，是为了消除溶液浑浊对测定结果的影响
C.另取待测溶液加入不含乙酰丙酮的醋酸铵溶液，是为，了消除样品中其他组分在显色温度下色度改变的影响
D.另取待测溶液加入不含乙酰丙酮的醋酸铵溶液，是为了消除带色样品液对测定结果的影响
E.乙酰丙酮在40℃会分解，要另取不加乙酰丙酮的作对照
参考答案：E
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| We should show respect (尊重) to everybody, especially our elders because they are ahead of us-in age, in wisdom, in experience and education. Our 1 have done a lot for us, directly or indirectly and most of us 2 everything to their kindness and love. When we 3 them respect, whether ii is by bowing to them, or 4 them with a smile, or offering them any help they need, it is one way of 5 our own love and gratitude (感激) to them. 6 , elders have also been through all the years you are 7 and know a little more about the world than you do. It is 8 that you do not agree with the belief of your elders but this is nothing new. All younger generations have always 9 with their elders and it is these differences that bring changes in human 10 . However much you disagree with them, give them credit (信任) for their 11 . With changing times and 12 influences, youngsters no longer know what is interpreted as disrespect to elders. Youngsters should 13 express their views and if there are arguments, they should not 14 their voices. If there is no space on sofas or chairs, children will immediately 15 their places, and sit on the carpet. In buses and trains, youngsters are 16 to give up their places to older people. This is not a 17 of who has more rights. It is simply that those who are youngsters have the strength to bear 18 , or stand unpleasantness, so it is natural to show consideration (体贴) to those who are older and perhaps at a 19 disadvantage (劣势). When you do simple things as a mark of respect, elders become 20 that youngsters care for them, and they respond with affection and kindness. | ||||
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