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何谓铜片腐蚀？

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试述多孔吸声材料的吸声原理。

Your company has an Active Directory Domain Services (AD DS) domain. All servers run Windows Server 2008 R2. You provide access to some applications through a virtual desktop infrastructure (VDI) environment. All virtual desktop computers are located in an organizational unit (OU) named VirtualDesktops . All other client computer objects are located in an OU named Desktops. Many users experience long logon times when logging into virtual desktop computers due to large roaming profiles. You need to reduce the user logon times for virtual desktop computers. What should you do?（）

A. On each virtual desktop computer, set a disk quota on the system drive.
B. On each client computer, set the temporary folders option to not use session-specific temporary folders.
Create a Group Policy object (GPO) that enables folder redirection for all users. Enable loopback processing, and link the GPO to the VirtualDesktops O
D. Create a Group Policy object (GPO) that enables folder redirection for all users. Enable slow link detection, and link the GPO to the VirtualDesktops O

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患者男性，43岁，有慢性乙肝病史十余年，未正规诊疗。近1年来时感腹胀，消瘦、尿少。近3天出现发热，明显腹痛、腹胀，小便发黄，尿量明显减少。查体：T38.1℃，意识恍惚，烦躁多语，慢性肝病面容，巩膜轻度黄染，明显肝掌，可见蜘蛛痣，腹部膨隆，下腹有压痛，轻度反跳痛，腹水征阳性。急诊化验：血常规：WBC10.8×10⁹/L，N89%；电解质K⁺3.5mmol/L，Na⁺131mmol/L，Cl^-98mmol/L，ALT180U/L，T-Bil68μmol/L，血氨96μmol/L。入院后应尽快完成的检查包括（）

A. 查凝血酶原活动度
B. 肝脏穿刺送病理诊断
C. 腹腔穿刺，化验腹水性质
D. 胃镜了解食管静脉情况
E. B超了解腹部情况
F. 脑电图检查

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患儿女，6岁，因“间断发热伴咳嗽迁延不愈和口腔白色膜状物5个月”来诊。病后精神尚可，食欲欠佳，排尿、排粪如常，体重有所下降，偶有双膝关节疼痛。1岁时因“体质差”输全血100ml。患病前5个月，曾患“川崎病”。查体：T38.5℃；体重16kg；口腔黏膜见多处白色膜状物，双侧扁桃体Ⅰ度肿大，充血；浅表淋巴结无肿大；双下肺细湿性啰音；肝肋下2cm，质中，脾未及；双膝及其他关节无红、肿、热、痛与变形。应采用的治疗措施包括（）

A. 抗病毒治疗
B. 静脉用免疫球蛋白
C. 局部用抗真菌药物
D. 抗生素治疗
E. 抗结核治疗
F. 糖皮质激素（＋免疫抑制药）
G. 干扰素
H. 胸腺肽

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