【多选题】以食物为传播载体和经粪—口途径传播的致病性病毒
【简答题】(本小题满分9分) 已知:△ABC是任意三角形. ⑴如图1所示,点M、P、N分别是边AB、BC、CA的中点.求证:∠MPN=∠A. ⑵如图2所示,点M、N分别在边AB、AC上,且 , ,点P1、P2是边BC的三等分点,你认为∠MP1N+∠MP2N=∠A是否正确?请说明你的理由. ⑶如图3所示,点M、N分别在边AB、AC上,且 , ,点P1、P2、……、P2009是边BC的2010等分点,则∠MP1...
【单选题】Without electricity,what ?
A.
will the world be like
B.
would the world be like
C.
the world will be like
D.
the World Would be like
【简答题】Without electricity, human life ________(be) quite different today.
【简答题】已知:X公司生产甲产品需使用一种直接材料A,本期生产甲产品1 000件,耗用A材料9 000千克,A材料的实际价格为200元/千克。假设A材料计划价格为210元/千克,单位甲产品标准用量为10千克。 要求: (1)计算A材料的价格差异。 (2)计算A材料的数量差异。 (3)计算A材料的成本差异。 (4)如果固定性制造费用的预算差异为+2 000元,生产能力利用差异为一580元,效率差异为+1 00...
【单选题】Without electricity human life quite different today.
【简答题】More than 1.5 billion people around the world live without electricity. Finding better ways to bring light to the poor is the goal of researchers like Professor Irvine. In the late 1990s, he was worki...
【简答题】Without electricity, there would be no modern industry.