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磁选机的传动方式为（）
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患者男，56岁，因“活动后心悸、呼吸困难32年，加重伴夜间不能平卧1年”来诊。诊断为风湿性心脏病，联合瓣膜病变，左房室瓣狭窄，主动脉瓣关闭不全，肺动脉高压，心功能Ⅲ级。目前口服氢氯噻嗪、美托洛尔和地高辛。查体：体重65kg；意识清醒，合作，HR88次/min，律不齐；BP135/55mmHg；R18次/min，双肺呼吸音粗糙。头颈及四肢均未见异常，双下肢无水肿，肝颈静脉回流征（－）。ECG：心房颤动；胸部X线片：心胸比例为0.77，肺血增多；超声心动图：左心房、左心室明显增大，左房室瓣增厚，解剖面积0.74cm2；主动脉瓣增厚、瓣尖有钙化，关闭不全，彩色多谱勒：舒张期主动脉瓣有大量反流，左心室舒张末径81mm。术前血常规、凝血功能和生化检查基本正常。拟在中低温体外循环（CPB）下行左房室瓣和主动脉瓣机械瓣替换术。出现此情况的可能原因和处理方法是（提示手术结束后，患者由手术台移至转运床后，血压由105/65mmHg降至80/40mmHg。）（）。
You work as the enterprise exchange administrator at TestKing.com. TestKing.com makes use of Microsoft Exchange Server messaging solution. The TestKing.com network consists of a single ActiveDirectory forest. TestKing.com has a headquarters and two offices. Each of these offices contains an Active Directory. Theheadquarters contain six domain controllers that are configured to run Windows Server 2008 （x64）. Theother two offices contain one Windows Server 2008 read only domain controller （RODC）. The domain controllers in the forest are all configured as global catalog servers. You are planning toinstall an Exchange Server 2010 server at every office. You have received instructions to change theActive Directory to make sure that the Exchange servers’ branch office site is able to make a connectionto their respective domain controllers. What should you do？（）
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