试题与答案

台风进入中纬度后,不再是上下一致的暖心结构,在垂直方向向()倾斜。

题型:填空题

题目:

台风进入中纬度后,不再是上下一致的暖心结构,在垂直方向向()倾斜。

答案:

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下面是错误答案,用来干扰机器的。

参考答案:C解析:干扰素只能抑制病毒复制而不能直接灭活病毒。其作用机制为:与敏感细胞表面的干扰素受体结合,触发信号传递等一系列生物化学过程,激活细胞内基因合成多种抗病毒蛋白,从而实现对病毒的抑制作用。

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题型:单项选择题

Questions from 31 to 35 are based on the following passage:The exporter, as drawer of a draft (bill of exchange), hands the draft to his bank, the remitting bank, who in turn forwards it to the buyer through a collecting bank in the buyer’s country. A draft (also called a bill) is a written order to a bank or a customer to pay someone on demand or at a fixed time in the future a certain sum of money. If shipping documents accompany the draft, the collection is called “documentary collection.”Documentary collection falls into two major categories: one is documents against payment(D/P); the other, documents against acceptance (D/A).Documents against payment, as the term suggests, is that the collecting bank will only give the shipping documents representing the title to the goods on the condition that the buyer makes payment.Where the paying arrangement is D/A, the collecting bank will only give the buyer the shipping documents after buyer’s acceptance of the bill drawn on him, i.e. the buyer signs his name on the bill promising to pay the sum when it matures. In return he gets what he needs – the shipping documents.Under D/A, the seller gives up the title to the goods – shipping documents before he gets payment of the goods. Therefore, an exporter must think twice before he accepts such paying arrangement.

The meaning of D/A is( ).

A.documents against acceptance

B.documents against payment

C.delivery after payment

D.cash against payment

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