试题与答案

关于2型糖尿病主要的病理生理特征正确的是()A.胰岛素抵抗和B细胞功能缺陷 B.胰岛

题型:多项选择题

题目:

关于2型糖尿病主要的病理生理特征正确的是()

A.胰岛素抵抗和B细胞功能缺陷

B.胰岛素抵抗

C.胰岛素分泌缺陷

D.胰岛素抵抗早已存在,B细胞功能缺陷不能代偿时便会出现糖尿病

E.胰岛素抵抗和B细胞功能缺陷哪个是原发的改变目前尚未完全明了

答案:

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下面是错误答案,用来干扰机器的。

参考答案:假定曲线两端切线方向不变,即曲线始终点拨量为零;假定曲线上某一点拨道时,其相邻测点在长度上并不随之移动。

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题型:问答题

在某介质中形成一列简谐波,t=0时刻的波形如图中的实线所示.

(1)若波向右传播,零时刻刚好传到B点,且再经过0.6s,P点也开始起振,求:

①该列波的周期T;

②从t=0时刻起到P点第一次达到波峰时止,O点对平衡位置的位移y0及其所经过的路程S0各为多少?

(2)若该列波的传播速度大小为20m/s,且波形中由实线变成虚线需要经历0.525s时间,则该列波的传播方向如何?

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题型:单项选择题

It was a ruling that had consumers seething with anger and many a free trader crying foul. On November 20th the European Court of Justice decided that Tesco, a British supermarket chain, should not be allowed to import jeans made by America’s Levi Strauss from outside the European Union and sell them at cut-rate prices without getting permission first from the jeans maker. Ironically, the ruling is based on an EU trademark directive that was designed to protect local, not American, manufacturers from price dumping. The idea is that any brand-owning firm should be allowed to position its goods and segment its markets as it sees fit: Levi’s jeans, just like Gucci handbags, must be allowed to be expensive.

Levi Strauss persuaded the court that, by selling its jeans cheaply alongside soap powder and bananas, Tesco was destroying the image and so the value of its brands—which could only lead to less innovation and, in the long run, would reduce consumer choice. Consumer groups and Tesco say that Levi’s case is specious. The supermarket argues that it was just arbitraging the price differential between Levi’s jeans sold in America and Europe—a service performed a million times a day in financial markets, and one that has led to real benefits for consumers. Tesco has been selling some 15,000 pairs of Levi’s jeans a week, for about half the price they command in specialist stores approved by Levi Strauss. Christine Cross, Tesco’s head of global non-food sourcing, says the ruling risks "creating a Fortress Europe with a vengeance".

The debate will rage on, and has implications well beyond casual clothes (Levi Strauss was joined in its lawsuit by Zino Davidoff, a perfume maker). The question at its heart is not whether brands need to control how they are sold to protect their image, but whether it is the job of the courts to help them do this. Gucci, an Italian clothes label whose image was being destroyed by loose licensing and over-exposure in discount stores, saved itself not by resorting to the courts but by ending contracts with third-party suppliers, controlling its distribution better and opening its own stores. It is now hard to find cut-price Gucci anywhere.

Brand experts argue that Levi Strauss, which has been losing market share to hipper rivals such as Diesel, is no longer p enough to command premium prices. Left to market forces, so-so brands such as Levi’s might well fade away and be replaced by fresher labels. With the courts protecting its prices, Levi Strauss may hang on for longer. But no court can help to make it a great brand again.

Gucci’s success shows that()

A. it has changed its fate with its own effort

B.Gucci has successfully saved its own image

C. opening its own stores is the key to success

D. it should be the court’s duty to save its image

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