已知瘦肉精（盐酸克伦特罗）的结构简式为
下列有关说法不正确的是（ ）
A．瘦肉精的化学式为C12H19Cl3N2O
B．瘦肉精属于芳香族化合物
C．瘦肉精一定条件下能发生消去反应
D．处于同一平面上的原子最多有10个
A．观察有机物的结构简式，可知有机物中含有12个C、19个H、3个Cl以及1个O，则分子式为C12H19Cl3N2O，故A正确；
B．分子中含有苯环，则属于芳香族化合物，故B正确；
C．分子中-OH临位有β-H原子，可发生消去反应，故C正确；
D．已知苯中12个原子位于同一平面，则该有机物中与苯环直接相连的原子共平面，至少有12个，故D错误．
故选D．
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| Roberta appeared on the stage. She took a deep breath and began to 1 . Now she was Portia, a strong-willed 2 in Shakespeare's The Merchant of Venice. The theater was filled with people. She was speaking with a power she had never before experienced, the words flowing 3 form her 4 , Roberta had never acted in her life before the audition (选拔试演). She 5 being in front of other people. She was very 6 at school. She had never thought she was good enough at anything to 7 much attention. She stayed mostly to herself, making 8 friends. She had excellent grades, 9 she always thought that something was missing. Two weeks before the audition, Robertsa's mother had heard about it and 10 her to join in. "I can't think of anyone else better suited to 11 the part. Remember all the plays you used to act our for us?” Her mother wouldn't let the 12 drop. “You're just a little scared (害怕). Everyone gets scared. You know you 13 do it. The trick is to look past the 14 to find the love of what you're doing.” So Roberta had made an appointment (预约) with the head of the Drama Club. She had read the play and found herself excited by the 15 of speaking such rich words. In secret she practiced Portia's part, 16 the lines by repeating them over and over. It wasn't hard; she 17 every minute of it. Every time she spoke the words, she had a new 18 of the lines, as if Shakespeare had written Portia on many levels. On the day of the audition, she 19 two of Portia's famous speeches for the auditors. When she had finished, the head of the Drama Club announced the 20 was hers. | ||||
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