属于Ib类的抗心律失常药物是
A．美西律
B．维拉帕米
C．利多卡因
D．卡托普利
E．强心苷
参考答案：A
解析：抗心律失常药分为四类：Ⅰ类为钠通道阻滞药，根据阻滞程度又分为三类，Ⅰa类适度阻滞钠通道，如奎尼丁、普鲁卡因胺和丙吡胺等。Ⅰb类轻度阻滞钠通道，如利多卡因、苯妥英钠、美西律、妥卡尼。Ⅰc类明显阻滞钠通道，如氟卡尼、普罗帕酮。Ⅱ类为β受体阻断药，如普萘洛尔。Ⅲ类为选择性延长复极的药物，如胺碘酮。Ⅳ类为钙拮抗药，如维拉帕米。
| 阅读理解。 阅读下面的短文，根据所读内容在文章后的表格中填入恰当的单词。 注意：表格中的每个空格只填1个单词。 | |||||||||||||||||||||||||||
| Different countries and different people have different manners. We must find out their customs, so that they will not think us ill-mannered. Here are examples of the things that a well-educated person does or does not do. If you visit a Chinese family you should knock at the door first. When the door opens, you will not move before the host says"Come in, please." After you enter the room, you should not sit down until the host asks you to take a seat. When a cup of tea is put on a tea table before you or sent to your hand, you will say," Thank you." And receive it with two hands, not one hand, or they will think you are ill-mannered. Before entering a house in Japan, it is good manners to take off your shoes. In European countries, even though shoes sometimes become very dirty, this is not done. In a Malay house, a guest never finishes the food on the table. He leaves a little to show that he has had enough. In England, a guest always finishes a drink or the food to show that he has enjoyed it. This will make the host, especially the hostess pleasant.
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