【单选题】
A、To indicate how climbers communicateD、
B.To show that climbers enjoyed many comforts.
C.To show that modern telephones work at high altitudes.
D.To emphasize how small some equipment had become.
网考网参考答案:D
网考网解析:
[听力原文] Why does the speaker mention a hand-held telephone [解析] 推理题。解答此题的关键是通过和过去的落后进行对比(in the past...much too heavy.But now...have been reduced to...)推导出对现在进步的肯定(emphasize how small)。
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