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单选题
According to the text, the laser can ______.
A

standardize telephone cables

B

remove communications jams

C

improve the quality of human voices

D

increase the capacity of communications


参考答案

参考解析
解析:
细节题。通过关键句,原文第二段“telephone companies are now using laser light signals to transmit telephone calls through extremely small cables that are capable of carrying many more transmissions than the standard telephone cables.”可知,利用激光传递信号的声音比普通的电话电缆要多很多,这样通讯的传输能力就增强了。其他选项均不符合题意,故正确的答案为D。
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