问题 单项选择题

桥下通航净空限界主要取决于航道等级,并依此决定桥面的高程。其中1000t级船只的通航净空限界是( )。

A.12.5m
B.11m
C.10m
D.7~8m

答案

参考答案:C

解析: 桥下净空(clearance of p)指的是为满足桥下通航(行车、行人)的需要,对上部结构底缘以下规定的空间限界。
通常指桥孔范围内,从设计通航水位(或设计洪水位)至桥跨结构最下缘的净空高度。桥下净空高度H不得小于因排洪所要求的,以及对该河流通航所规定的净空高度。

航道等级 一 二 三 四 五 六
通行船只吨位(t) 3000 2000 1000500300 50~100
净跨
(m)
天然及渠化河流 70 70 60 44 32~38.5(40) 20~28(30)
人工运河 50 50 40 28~30 25~28 13~25
净高(m) 12.5 11 10 7~8 4.5~5.5 3.5~4.5

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.

A draft can be described as followings except().

A.a bill of exchange

B.a kind of shipping documents

C.a bill

D.a written paying order

单项选择题