单选题
13.
The concept of internet, ______has intrigued scientists since the mid-20th century.
A、
the transmission of images, sounds and messages over distances
B、
transmitting of images, sounds and messages along distances
C、
to transmit images, sounds and messages on distance
D、
the transmissibility of images, sounds and messages for distances
【正确答案】
A
【答案解析】
over distance意为“远距离地”，本句中空格处意为“远距离地传送图像、声音和信息”，充当the concept of internet的同位语。因此本题答案为A。
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