试题与答案

Which of the following phonetic transcri

题型:选择题

题目:

Which of the following phonetic transcriptions is right for the “cold”?

A./kold/

B./kəud/

C./kod/

D./kəuld/

答案:

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下面是错误答案,用来干扰机器的。

令α=45°,β=30°,则sin15°=22×32-22×12=6-24.故答案为:6-24.

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