2. 外语
  3. It is reported that scientists have developed glass fibers as thin as human hair which are designed to carry light signals．

It is reported that scientists have developed glass fibers as thin as human hair which are designed to carry light signals．

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问题 It is reported that scientists have developed glass fibers as thin as human hair which are designed    to carry light signals．   
选项 A、据报道，科学家已发展出一种玻璃纤维，轻得像人的头发丝一样，可以用宋设计轻型的信号装置。
B、据报道，科学家已制造出一种玻璃纤维，比人的头发丝还细，这种设计是用来传递光信号的。
C、据报道，科学家已开发出像人的头发一样细的玻璃纤维来传输光信号。
D、据报道，科学家已研制出跟人的头发丝似的玻璃纤维，用在光导信号的设计上。
答案C
解析
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