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【单选题】
下列陈述错误的是A.
加工所要求的限制的自由度没有限制是欠定位、欠定位是不允许的。
B.
欠定位和过定位可能同时存在。
C.
如果工件的定位面精度较高，夹具的定位元件的精度也高，过定位是可以允许的。
D.
当定位元件所限制的自由度数大于六个时，才会出现过定位。
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皮皮学刷刷变学霸
举一反三
【单选题】On each line in Column II there is one word which is a synonym of the word in Column I. Circle the synonyms. 5 distant
A.
remote
B.
close
C.
near
【单选题】On each line in Column II there is one word which is a synonym of the word in Column I. Circle the synonyms. 4 moisture
A.
dryness
B.
arid
C.
humidity
【单选题】On each line in Column II there is one word which is a synonym of the word in Column I. Circle the synonyms. 3 influence
A.
ineffectiveness
B.
impact
C.
impotence
【单选题】On each line in Column II there is one word which is a synonym of the word in Column I. Circle the synonyms. 1 combination
A.
separation
B.
mixture
C.
division
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