问题
单项选择题 B型题
氯丙嗪引起帕金森综合征是由于（）
A．阻断M胆碱受体
B．阻断黑质纹状体多巴胺受体
C．阻断中脑边缘系统多巴胺受体
D．阻断α-肾上腺素受体
E．阻断结节漏斗部多巴胺受体
答案
参考答案：B
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氯丙嗪引起帕金森综合征是由于（）
A．阻断M胆碱受体
B．阻断黑质纹状体多巴胺受体
C．阻断中脑边缘系统多巴胺受体
D．阻断α-肾上腺素受体
E．阻断结节漏斗部多巴胺受体
参考答案：B
完形填空 阅读下面的短文，掌握其大意，然后从短文后各题所给的A、B、C、D四个选项中，选择最佳选项。 Are you nervous when you stand in front of the public? Are you afraid to make a speech? Li Jun, a middle school boy, felt shy when he was making a speech the other day. Li had thought it would be quite easy to speak in front of 1 classmates. "I was wrong. It was very different and much 2 than talking to my classmates during playtime," Li said. "I tried, but it was really difficult to speak. I felt like a mute (哑巴) and wanted to leave the classroom 3 " Li is not ___4____. Many middle school students now have the same 5 : they can talk about their ideas freely 6 their best friends after class, but can't speak in public. According to Zhou Hong, a teacher from a university, the main reason is that schools in China pay more attention to writing instead of 7 . Zhou hopes schools can give students more chances to open their 8 , such as speech competitions, English corners and class discussions. Students can join in any one they want to. 9 he also gives some advice to students. "During your free time you should 10 more. When you're speaking in public, take it ___11___. Just imagine you're talking to nobody and speak up your ideas clearly," Zhou said. "That 12 a fine public speech and you'll feel confident. "
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