题目内容

使两个构件直接接触并能产生相对运动的联接称为运动副。 ( )

A. 对
B. 错

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When we meet a person for the first time we say: _____.

A. Pleased
B. Nice to meet you
C. Enchanted

If someone says "Thank you", you say: "You're _____."

A. welcome
B. well
C. nothing

When you want to get someone's attention you can say: _____.

A. Excuse me
B. Stop
C. Sorry

At 9 o'clock a.m., you say: _____.

A. Good evening
B. Good afternoon
C. Good morning

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