试题与答案

数控铣床是通过()轴联动加工零件的平面轮廓。 A.一 B.二 C.三 D.四

题型:单项选择题

题目:

数控铣床是通过()轴联动加工零件的平面轮廓。

A.一

B.二

C.三

D.四

答案:

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C. moves up and down

D. does a little dance

4. Several different sounds can be made by a ______. [ ]

A. rabbit

B. bee

C. bird

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5. From the passage, we know that ______ use words and sentences to express ideas and thoughts. [ ]

A. all living things

B. all animals

C. some birds

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