病历摘要：患者男性，29岁，因心悸气促5天入院。既往有心脏病史。体检：心率200次/分，胸骨左缘第3肋间闻及4/6级收缩期杂音，伴震颤，P2亢进。
此时最急需要的化验是提示：患者住院期间，出现恶心、呕吐，解水样便，出现晕厥。心电图示；尖端扭转性室性心动过速（）.
A.地高辛浓度测定
B.尿常规
C.血常规
D.肝功能检查
E.血气分析
F.血电解质检查
参考答案：F
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| The Internet is becoming more and more important in our life. How much do you know about it? What is the Internet? The Internet is a large, worldwide collection of computer networks. A network is a small group of computers put together. The Internet is many different networks from all over the world. These networks are called the Internet. Once you have learned to use the Internet, you can have a lot of interest in the World Wide Web. What is the World Wide Web? The World Wide Web is the most popular development (发展) of the Internet. The Web is like a big electronic (电子的) book with millions of pages. These pages are called homepages. You can find information about almost anything in the world on these pages. For example, you can use the Internet instead of a library to find information for your homework. You can also find information about your favourite sports or film stars, talk to your friends or even do some shopping on the Internet. Most pages have words, pictures and even sound or music. What is e-mail? An e-mail is a way to send messages to others. It's much quicker and cheaper than sending a letter. If you want to send e-mails, you must have an e-mail address. This address must have letters and dots (点) and an '@' (meaning 'at'). This is what an address looks like: Emily @ star. net. Write a message, type in (输入) the person's e-mail address, and then send the message on the Internet. People don't need to use stamps, envelopes(信封) or go to the post office since the invention of the Internet. Quick. easy and interesting — that's the Internet!
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