风湿性心脏病二尖瓣狭窄最常见的心律失常是( )
A．心房颤动B．房室传导阻滞C．室上性心动过速D．室性期前收缩E．心房扑动
参考答案：A
用词、短语或句子补全对话。
(Liu Ming and Wang Hai are making plans for their holidays.)
A: Hi, Wang Hai. 1.______
B: I am going to sports camp in Shandong.
A: Who are you going with?
B: My friends.
A: 2.______B: On the 10th of January.
A: 3 ______are you staying there?
B: For about two weeks. What's your 4. ______ ?
A: I am visiting Beijing with my family. We're leaving this Friday.
B: 5.______ Have a good time.
芸香科柑橘属植物叶的类型为 ① 。
