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【单选题】
根据物联网的本质属性和应用特征,其体系结构可以分为( )三个层次。A.
物理层、网络传输层和应用服务层
B.
感知互动层、网络传输层和应用服务层
C.
感知互动层、数据层和应用服务层
D.
感觉层、传输层和标识层
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反馈参考答案：
举一反三
【单选题】When a tax is collected from the buyers in a market,
A.
the buyers bear the burden of the tax.
B.
the sellers bear the burden of the tax.
C.
the tax burden on the buyers and sellers is the same as an equivalent tax collected from the sellers.
D.
the tax burden falls most heavily on the buyers.
【简答题】已知放大电路中处于正常放大状态的某晶体管的三个电极的对地电位分别为 V E =6V,V B =5.3V, V C =0V, 则该管为 ___。
【判断题】If a quantity tax is collected from competitive suppliers of a good, placing a tax on the good causes the price paid by consumers to increase more than if the tax had been collected directly from the ...
A.
正确
B.
错误
【单选题】已知放大电路中处于正常放大状态的某晶体管的三个电极对地电位分别为 V E ＝6 V， V B ＝5.3 V， V C ＝0 V，则该管为（ ）
A.
PNP 型锗管
B.
NPN 型锗管
C.
PNP 型硅管
D.
NPN 型硅管
【判断题】When we use the model of supply and demand to analyse a tax collected from the buyers, we shift the demand curve upward by the size of the tax.
A.
正确
B.
错误
【单选题】品牌的市场作用主要表现的方面不包括（ ）。
A.
品牌是企业与消费者之间的一份无形契约，是对消费者的一种保证，有品牌与无品牌的产品相比，消费者更多地信赖有品牌的产品
B.
品牌是消费者选择商品的依据，是消费经验的积累与运用
C.
品牌是规避单纯价格竞争的一种手段，因为消费者愿意为品牌的特有附加价值，支付一定的费用
D.
品牌是身份和地位的象征，有利于促进产品销售，树立品牌形象
【简答题】A．Income tax is collected from even the poorest citizen. B．State tax is collected from even the poorest citizen. C．Social security tax is collected from even the poorest citizen. D．Sales tax is collec...
【简答题】酒店品牌建设主要体现为有益于企业参与市场竞争、有益于提高产品和服务的质量与企业形象、有益于 的作用。
【单选题】Within the supply-and-demand model, a tax collected from the buyers of a good shifts the
A.
demand curve upward by the size of the tax per unit.
B.
demand curve downward by the size of the tax per unit.
C.
supply curve upward by the size of the tax per unit.
D.
supply curve downward by the size of the tax per unit.
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