关于呼吸困难，下列哪项描述是不正确的
A．重症贫血可产生呼吸困难
B．代谢性酸中毒可出现浅而快的呼吸
C．巴比妥中毒时常出现潮式呼吸
D．癔症的呼吸困难表现为呼吸频率明显加快
E．脑出血的呼吸困难是由于呼吸中枢功能障碍
参考答案：B
解析：呼吸困难是指患者有通气不足、呼吸费力的症状，同时伴有呼吸频率、深度的变化和节律的异常。代谢性酸中毒引起的呼吸困难属中毒性呼吸困难，应该是深大呼吸，频率或快或慢，据病因不同呼出的气可有尿(氨)味(见于尿毒症)、烂苹果味(见于糖尿病酮症酸中毒)。因而答案是B，其余各项呼吸困难的描述均是正确的。
There are many things you can do to improve your memory(记忆力). Among them are many kinds of useful ways as well as taking special care of your health. It is important that you make yourself excited to make your memory more active. You can do this by doing some new activities and by changing your daily habits（习惯）. Learning a new skill helps your brain（大脑）to develop. When trying to remember something, you should pay special attention to the most important things about it .Do not allow other thoughts to enter your mind because this will reduce your chances of making right memories. An excellent way to help memory is to connect information with pictures. Try to see the pictures in your mind. Taking notes and keeping a diary will also be helpful.  In order to keep your mind on your work, you must be free from worry. Generally keeping fit and normal health checks are both important as well-not just for improving your memory.
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