关于染色体与染色质的关系，下列说法正确的是： ①同一种物质 ②不同种物质 ③形态

下列各项关于外汇的描述，错误的是( )。

A．外汇是国际汇兑的简称

B．外汇是用于清偿国际间债权债务关系的一种专门性的经营活动

C．外汇是指一个国家的货币兑换成另一个国家货币的金融活动

D．外汇是指以人民币表示的所有可以用于国际结算的支付手段

Ab Co is a designer and manufacturer of highly specialist pressure transmitting systems. It required pressure sensors of a more than usual sensitivity for a particular contract. In search of the necessary components it approached Ba Co, a manufacturer of such equipment. In order to convince Ab Co of the suitability of their product Ba Co arranged for a technological evaluation of their sensors and were delighted when they more than matched the standard and announced the fact in their trade association journal. Ab Co was also delighted at the results of the tests and ordered the sensors from Ba Co.When Cy read the journal he was also sure that the sensors would be sensitive enough to function on a specialist project he was working on, so he also ordered a batch of the sensors from Ba Co.Unfortunately when Ab Co incorporated the sensors into its pressure transmitting systems they proved to be not as sensitive as it had been led to believe and caused the failure of the whole system. In fact the sensors were no more sensitive than normal sensors, available at a much lower price.Cy’s specialist project also failed because of the lack of sensitivity of the component sensors and he lost a valuable contract as a result.Required:Assuming that the UN Convention on Contracts for the International Sale of Goods applies, advise AB Co and Cy as to any rights and recourse they may have against Ba Co. (10 marks)

一般来讲，作用强或副作用大的药物属于（）

A.处方药

B.甲类非处方药

C.乙类非处方药

D.非处方药

E.中草药

关于感染性休克的休克发展期（淤血缺氧期），下列哪一项是不正确的（）

A.无氧代射酸性产物（乳酸）增加

B.肥大细胞释放组胺增加

C.缓激肽形成增多

D.自由基生成减少

E.毛细血管流体静脉压增高，导致通透性增加，血浆外渗

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