问题
单项选择题 A1/A2型题
关于QRS综合波的命名，错误的是（）
A.QRS综合波中先出现的负向波为Q波
B.QRS结合波中先出现的正向波是R波
C.R波后出现的负向波称为S波
D.S波后再出现的正向波称为T波
E.整个综合波均属负向波者称为QS波
答案
参考答案：D
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关于QRS综合波的命名，错误的是（）
A.QRS综合波中先出现的负向波为Q波
B.QRS结合波中先出现的正向波是R波
C.R波后出现的负向波称为S波
D.S波后再出现的正向波称为T波
E.整个综合波均属负向波者称为QS波
参考答案：D
根据对话内容，从方框中所给的七个选项中选出五个句子补全对话，使对话完整、通顺。并将所选标号在对话后面的横线上。 Li Yang: Good morning, Mathew. Mathew: Good morning, Li Yang. 小题1: Li Yang: There's still smog（雾霾）today. We'll have to go to school with face masks（口罩）． Mathew: 小题2: According to the news, PM2.5 pollution is the main problem with air pollution. Li Yang: Yes, and air pollution has done harm to people's health. Mathew: So the Chinese government and Chinese people must take action to fight it. Ji Yang: 小题3: Mathew: Since PM2.5 is mainly caused by vehicles（机动车）and factories, cars with large emissions（排放）should not be allowed and factories should be closely watched. Li Yang: 小题4: We hope that more and more people will join us in making the blue skies return for good. Mathew: 小题5:
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