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女孩，10岁。发热3周，大关节游走性肿痛14d。发病前12d有化脓性扁桃体炎病史。体检：体温38.5℃，皮肤有环形红斑，咽充血，心、肺无异常，右膝及左肘关节红、肿、热、痛伴活动障碍。 ASO 700u，血沉45 mm/h。
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第一节 听下面5段对话，每段对话后有一个小题，从题中所给的A、B、C三个选项选出最佳选项，并标在试卷的相应位置。 听完每段对话后，你都有10秒钟的时间来回答有关小题和阅读下一小题。每段对话仅读一遍。 How does the man feel about being a reporter
Text 3 Getting a new PC is one thing. Keeping it running smoothly is quite another. While a personal computer should continue to perform well for years, users know that system unsteadiness (不稳定性) does exist. Yet you can reduce it to the smallest amount by following the tips below. First, put in as little software (软件) as possible. You’ll have fewer software-related problems and a system that is easier to manage. Second, you should ensure (确保) that you have as much memory (RAM) in your PC as you need. If you run Windows 98, your computer should have at least 128 megabytes (MB) of RAM and more. You can also get by with 128 MB of RAM if you use Windows NT or Windows 2000, but these operating systems will run much more smoothly if you have 256 MB of RAM or more. Third, make sure you buy good hardware (硬件). No-name products may be cheaper and sometimes just as good as name-brand products, but name-brand products usually become well-known because Windows will more often support the hardware that you buy. If you are starting out with computers, it’s also a good idea to buy ready- made systems from major manufactures (制造商). They are likely to have been tested thoroughly with your operating system, and you will generally experience fewer problems. Fourth, do prepare for disaster. No matter how well your system runs when you get it, the day will come when it will need to be replaced. Hopefully (但愿), you will replace it because technology has become out-dated, but you may need to replace it also because the hard drive crashes (毁坏) or you begin experiencing problems that no one can figure out. That’s why it’s important to copy your important information regularly. Whether you use a tape backup device or a CD-ROM drive, it’s important to make a regular backup plan and stick to it. How many pieces of advice does the writer give us
患儿，男，8岁。发热伴游走性关节疼痛2周。化验检查：抗“O”＞500U，临床诊断为风湿性关节炎，请问何种病原引起此病
男孩，10个月。生后易患肺炎、肠炎，常伴湿疹样皮疹。两个舅舅分别因“败血症”及“急惊风”早夭。体检：营养发育稍差，苍白，两颊有湿疹样皮疹，躯干与两下肢见瘀点、瘀斑，咽稍充血，心肺正常，肝肋下2cm，脾肋下1cm，神经系统正常。血红蛋白 98g/L，白细胞12.5×109/L，中性粒细胞0.56，淋巴细胞0.44，血小板56.5×109/L。 为明确诊断，应进行下列哪项检查
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