多环芳烃类的化合物中，（）是由食品进入人体内最多、最主要的一类物质。_食品安全学_全学科试题题库

当前学科：食品安全学

题目：单选
多环芳烃类的化合物中，（）是由食品进入人体内最多、最主要的一类物质。
答案： <查看本题扣1积分>

查看答案

答案不对？请尝试站内搜索

推荐知识点:

国内速递业务网是由（）、邮件处理中心和邮路运输组成。

下面（）道路交叉口适宜处理成环形交叉口。

检验电气设备承受雷电压和操作电压的绝缘性能和保护性能，应采用的检验方法为()。

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

关于头皮撕脱伤哪项正确（）

为充分利用螺旋箍筋对轴心受压构件受压承载力的增强效果，采用螺旋箍筋后的承载力设计值宜超过按普通箍筋柱承载力的50%以上

男式发型根据留发长短分为（）大类。

《素问·阴阳应象大论》指出对“精不足者”，宜采取的治则是（）。

工程建设过程中，监理单位应认真履行以下职责（）。

碳酸锂的下述不良反应中哪项是错的()