题目内容

热流密度的方向与温度梯度的方向相反。

A. 对
B. 错

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物体的温度分布是空间和时间的函数。

A. 对
B. 错

商业银行经营的三原则是、和__。

You will hear 8 short conversations. After each conversation, there will be a recorded question. After each question, there will be a pause of 10 seconds. The conversations and questions will be spoken twice. When you hear a question, you should decide on the correct answer from the 4 choices marked A, B, C and D.[音频]

A. To travel.
B. To teach.
C. To work.
D. To study.

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