问题
单项选择题
药物出现副反应的主要原因是
A．药物的选择性低
B．药物的剂量过大
C．药物的代谢速度慢
D．药物排泄过慢
E．患者对药物的敏感性高
答案
参考答案：A
解析：药物副反应产生的原因与药物的选择性低有关，即药物在治疗剂量下可产生多个效应，其某个效应用作治疗目的时，其他的效应就成为副反应。
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药物出现副反应的主要原因是
A．药物的选择性低
B．药物的剂量过大
C．药物的代谢速度慢
D．药物排泄过慢
E．患者对药物的敏感性高
参考答案：A
解析：药物副反应产生的原因与药物的选择性低有关，即药物在治疗剂量下可产生多个效应，其某个效应用作治疗目的时，其他的效应就成为副反应。
“USA? Britain? Which country is better to study in?” We often hear such discussions. As China open its door, it is a dream for many Chinese students to study abroad. They want to learn about the outside world. It’s true that studying abroad can help students develop themselves. Their foreign language skills will be improved and it may be easier to find jobs. But there are problems that should be considered. Language is the first. Students must spend a lot of time learning another language. Students must also learn to live without parents’ care and deal with all kinds of things they haven’t to do before, like looking after themselves. There are reports about Chineses students abroad running into an ocean of difficulties and giving up finally. When they have to take care of themselves, it is hard for students to study well. Finally, studying abroad brings a heavy burden to the family. For most Chinese parents, the cost of studying abroad is very high. But is it worth it? We know that there are many famous people who have achieved success through their hard work in China. Liu Xiang is a good example. Once an American teacher invited him there, but he refused. He kept training hard with his Chinese teacher. He surprised the world when he won a gold medal at the Athens Olympic Games. So when you winder which country is better to study in, think it again.
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