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【单选题】
传输介质是网络中收发双方之间的物理通道,下列传输介质中,具有很高的数据传输速率、信号传输衰减最小、抗干扰能力最强的是A.
电话线
B.
光纤
C.
同轴电缆
D.
双绞线
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举一反三
【简答题】简述能级相称原理的内容
【单选题】______ is often the case, Miss Wang was the first to get to school. [ ]
A.
Which
B.
What
C.
As
D.
It
【单选题】The scope of freight forwarder’s service on behalf of consignors includes （ ）.
A.
booking space with consignee
B.
paying the freight to the insurer
C.
arranging import customs clearance
D.
booking space with carrier
【简答题】牛顿冷却定律表达式为( ),其中温度差指的是( )。
【简答题】Read the diagram in banana juice , and answer the following questions: 1、Why is citric acid used? 2、What’s the purpose of blanching? 3、Why was amylase added? 4、Why was pectinase added?
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