2. 外语
  3. Fiber-optic cables can carry hundreds of telephone conversations ______.

Fiber-optic cables can carry hundreds of telephone conversations ______.

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问题 Fiber-optic cables can carry hundreds of telephone conversations ______.
选项 A、simultaneously
B、spontaneously
C、homogeneously
D、contemporarily
答案A
解析 句意：光缆能够同时保证上百对电话的使用。simultaneously同时地。spontaneously自发地，自然地。 homogeneous同种的，同质的。contemporary同时代的。
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