题目内容

平面四杆机构的基本形式是。

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铰链四杆机构的两种演化方式是：一、；二、。

What is the function of rising or falling intonation?

A. To sound natural.
B. To sound native.
C. To express speakers' feelings or attitudes.
D. To sound fluent.

Chinese is an intonation language while English is an tone language.

A. 对
B. 错

Intonation is the rise and fall of the pitch changes of the voice on the nucleus.

A. 对
B. 错