题目内容

绝对误差一定是正值。

A. 对
B. 错

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绝对误差越大则相对误差也越大。

A. 对
B. 错

There are changes in doing handshake according to cultural differences.

A. True
B. False

You can stand or sit when extending your hand.

A. True
B. False

Finish doing handshake before the introduction ends.

A. True
B. False

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