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（8分）获取知识和信息是现代人不可缺少的素质，信息产业的飞速发展离不开材料科学的推动。 （1）光导纤维是一种能高质量传导光的玻璃纤维，利用光缆通讯，能同时传输大量信息。制造光纤电缆的主要原材料的化学式是________ （2）信息产业的核心材料是高纯度的硅，高纯度的单晶硅生产方法之一： SiO 2 Si（粗硅） SiHCl 3 （沸点31．5℃） Si 超纯硅（多晶硅） 单晶硅 近代用得较多的另一种方法（之二）是：用金属硅化物（Mg 2 Si）与盐酸作用制得硅烷，再热分解硅烷可得。根据上述信息回答以下问题： 从方法一生产单晶硅的过程看，由碳还原得到的硅为何还要进一步处理？ （3）写出方法二中，生产的两个化学反应方程式： ①____________________ _。②______________
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【简答题】办理支付结算时，（ ）的结算凭证，银行不予受理。
【单选题】( ) service has no fixed itinerary or schedule and is operated on any route according to supply and demand of the shipping market.
A.
Line
B.
Tramp
C.
NVOCC
D.
Non-conference lines
【单选题】Which of the following is true of shipping goods via water transportation?
A.
Water transportation is an efficient way to ship perishable merchandise over long distances.
B.
Water carriers are highly flexible in their routing and time schedules.
C.
Water transportation provides in-transit services, such as the processing of goods en route.
D.
Water transportation is ideal when time is short and speed is needed.
【单选题】Why could goods from the American interior be shipped directly to the Atlantic?
A.
new shipping route
B.
new transportation system
C.
more people made new inventions
D.
new inventions
【单选题】In the vicinity of well-established shipping route, ______.
A.
other aids available should be inoperative
B.
the local pilotage guidance is required
C.
charts may be used with confidence for normal navigational needs
D.
no chart is infallible
【简答题】I. Match the terms with the following definitions shipping JIT ( Just-In-Time) warehousing cross-docking cycle stock a private warehousing in-transit inventory a public warehousing seasonal inventory ...
【单选题】___________ service has no fixed itinerary or schedule and is operated on any route according to supply and demand of the shipping market.
A.
Liner
B.
Tramp
C.
NVOCC
D.
Non-conference lines
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