问题
单项选择题
卡比多巴与左旋多巴合用的理由是
A．提高脑内多巴胺的浓度，增强左旋多巴的疗效
B．减慢左旋多巴由肾脏排泄，增强左旋多巴的疗效
C．卡比多巴直接激动多巴胺受体，增强左旋多巴的疗效
D．抑制多巴胺的再摄取，增强左旋多巴的疗效
E．卡比多巴阻断胆碱受体，增强左旋多巴的疗效
答案
参考答案：A
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卡比多巴与左旋多巴合用的理由是
A．提高脑内多巴胺的浓度，增强左旋多巴的疗效
B．减慢左旋多巴由肾脏排泄，增强左旋多巴的疗效
C．卡比多巴直接激动多巴胺受体，增强左旋多巴的疗效
D．抑制多巴胺的再摄取，增强左旋多巴的疗效
E．卡比多巴阻断胆碱受体，增强左旋多巴的疗效
参考答案：A
| 阅读理解。 | |
| A group of fifteen-year-olds at Sunshine School are holding a charity sale to raise money to help their classmate Lisa. Lisa had cerebral palsy (大脑性瘫痪) when she was a baby. Although Lisa has to use a wheelchair to help her get around, she never gives up. And she is always ready to help others. Lisa has the chance of standing up, but she needs an operation (手术) which will cost lots of money." Lisa's doctor said. "I never thought that I could stand up one day. Actually the news is surprising for me. However, when I see my parents are worried about the cost of the operation, I am sad. I am used to my life. I don't mind even if I can't stand up," Lisa said, "Now ray classmates and some other kind people are helping me. I am really thankful. If I stood up one day, I would try my best to help more people." "While helping Lisa, we can also learn a lot. We have learned how to cook cookies and how to sell them," Betty, one of Lisa's classmates said."Now we know making money is not easy, so we won't waste money anymore." Alex, a boy in Lisa's class, told a reporter that they could raise about $100 every day. "We have raised about $2,100 so far. We hope we will raise more money for Lisa's operation," said he. | |
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