【单选题】负需求是指绝大多数人对某个产品感到厌恶,甚至愿意出钱回避它的一种需求状况。无需求则是指目标市场顾客对某个产品从来不感兴趣或漠不关心。 根据上述定义,下列不属于负需求的是:
A.
近年来许多老年人为预防各种老年疾病不敢吃甜点心和肥肉
C.
害怕化纤纺织品有毒物质损害身体而不敢购买化纤服装
【单选题】The Turing machine is an abstract(71)of computer execution and storage introduced in 1936 by Alan Turing to give a mathematically precise definition of(72). or 'mechanical procedure'. As such it is st...
【单选题】He turned as someone __________ him on the shoulder.
【单选题】( )是指绝大多数人对某个产品感到厌恶、甚至愿意出钱回避它的一种需求状态。
【单选题】狭义财产保险则是指以( )为保险标的的保险。
【单选题】Air Canada announced that on June 2,2005 it will introduce non-stop service between Toronto and Beijing, further building its main Toronto hub (中枢) with more non-stop flights to Asia and creating the ...
A.
There was no non-stop service between Canada and China mainland.
B.
People in our countries could fly to Canada from Beijing directly three years ago.
C.
More people will fly to Canada from China directly.
D.
Air Canada is increasing the capacity of goods transportation for the first time.
【单选题】某患者,男性,30岁,因由幽门梗阻呕吐10天,测得pH值7.48,二氧化碳结合力(CO2CP)32mmo/L。该患者可能出现了
【简答题】(16分)NH 3 在生活生产中用途广泛。 (1)下列关于NH 3 或氨水的实验能达到目的的是 (填编号) 编号 A B C D 实验 装置 实验 目的 实验室模拟侯氏制碱法制备NH 4 HCO 3 验证NH 3 易溶于水 制备银氨溶液 干燥NH 3 (2)利用下图装置(气密性良好)在实验室模拟工业合成氨。 ①N 2 和H 2 通过A装置,A装置的作用除了将气体混合外,还有 、 作用。 ②实验结束...