在下列网络中的传输介质中,抗干扰能力最好的一个是( )
A. 光缆
B. 同轴电缆
C. 双绞线
D. 电话线
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Question 3 and 4 are based on the news report you have just heard.[音频]Question 3
A. It is the largest of its kind.
B. It is going to be expanded.
C. It is displaying more fossil specimens.
D. It is starting an online exhibition.
Question 4
A collection of bird fossils from Australia.
B. Photographs of certain rare fossil exhibits.
C. Some ancient wall paintings from Australia.
D. Pictures by winners of a wildlife photo contest.
What is the core of maker culture?It is 1i_________ or 2c________.
通过观察以下曲线要素，可判定线路中线为右偏曲线的是：
A. R=1000m
B. αY=15°21′09″
C. lo=90m
D. T=97.032
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