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关于有线传输和无线传输的描述中，正确的是()A.无线传输信号衰减多样B.有线传输比无线传输易受干扰C.有线传输多径传播特性明显D.无线传输利用电磁波传送信号
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可用于治疗持续性肺动脉高压的气体为（）
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一个人选择当警察的可能原因不包括（）
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以下哪一项是急性胆囊炎与慢性胆囊炎的鉴别点之一
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再贴现率提高，商业银行的再融资成本（），（）国内总需求。
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患者，男性，42岁，车祸后脾破裂大出血，继而出现尿量减少。如果检查结果为尿沉渣阴性，血尿素32mmol/L，血肌酐520μmol/L，血红蛋白55g/L，尿渗透压320mOsm/L，可能的诊断是（）
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风湿性心脏病患者，突发呼吸困难，咳粉红色泡沫痰，血压120/80mmHg，心率140次／分，心律绝对不齐。首选药物是（）
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患者，男性，52岁，57kg，13年前无明显原因感劳累后心悸、气短，因近一个半月症状明显加重，咳嗽、咯白色泡沫痰，不能平卧入院。体检：T37．5℃，RR20次／分，P118次／分，BP95／60mmHg。颈静脉怒张，听诊两中下肺野可闻及湿啰音，心律不齐，心前区舒张期杂音及剑突下收缩期杂音，肝右肋下4cm，双下肢凹陷性水肿。经检查心电图示：异位心律，心室率144次／分，心房纤颤；胸部X平片：双肺淤血，肺动脉主干扩张，左房右室增大；超声心动图示：二尖瓣增厚、钙化，交界部粘连，开放明显受限，关闭时少量反流。瓣口面积0．8cm2，三尖瓣回声偏强，开放正常关闭欠佳。心导管检查示右房压17mmHg，肺动脉压63mmHg，肺毛细血管楔压23mmHg，心输出量2．2升／分；血气分析pH7．25，PCO235mmHg，PO278mmHg，BE-7．5。在麻醉过程中，对于该患者下列哪些麻醉诱导用药是适宜的（）。
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根据以下资料，回答题。On a five to three vote, the Supreme Court knocked out much of Arizona’s immigration law Monday-a modest policy victory for the Obama Administration.But on the more important matter of the Constitution,the decision was an 8-0 defeat for the Administration’s effort to upset the balance of power between the federal government and the states.In Arizona v.United States, the majority overturned three of the four contested provisions of Arizona’s controversial plan to have state and local police enforce federal immigration law.The Constitutional principles that Washington alone has the power to “establish a uniform Rule of Naturalization ”and that federal laws precede state laws are noncontroversial .Arizona had attempted to fashion state policies that ran parallel to the existing federal ones.Justice Anthony Kennedy, joined by Chief Justice John Roberts and the Court’s liberals, ruled that the state flew too close to the federal sun.On the overturned provisions the majority held the congress had deliberately “occupied the field” and Arizona had thus intruded on the federal’s privileged powers.However,the Justices said that Arizona police would be allowed to verify the legal status of people who come in contact with law enforcement.That’s because Congress has always envisioned joint federal-state immigration enforcement and explicitly encourages state officers to share information and cooperate with federal colleagues.Two of the three objecting Justice-Samuel Alito and Clarence Thomas-agreed with this Constitutional logic but disagreed about which Arizona rules conflicted with the federal statute.The only major objection came from Justice Antonin Scalia,who offered an even more robust defense of state privileges going back to the alien and Sedition Acts.The 8-0 objection to President Obama turns on what Justice Samuel Alito describes in his objection as “a shocking assertion assertion of federal executive power”.The White House argued that Arizona’s laws conflicted with its enforcement priorities,even if state laws complied with federal statutes to the letter.In effect, the White House claimed that it could invalidate any otherwise legitimate state law that it disagrees with . Some powers do belong exclusively to the federal government, and control of citizenship and the borders is among them.But if Congress wanted to prevent states from using their own resources to check immigration status, it could.It never did so.The administration was in essence asserting that because it didn’t want to carry out Congress’s immigration wishes, no state should be allowed to do so either. Every Justice rightly rejected this remarkable claim. Three provisions of Arizona’s plan were overturned because they
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PAT和NAT有什么区别？