数控机床可以加工球面,因此G02、G03指令可以描述任意平面内的圆弧。( )
参考答案:错
判断句子正误,正确的画“√”,错误的画“×”。
( ) 1. Statue of Liberty is in Washington, D. C.
( ) 2. The flag of the U. S. has stars and stripes.
( ) 3. The president of the U. S. lives in New York.
( ) 4. China is north of the U. S.
通常烧结机机尾红火层的厚度为整个料层厚度的()为正常。
A.1/2-1/3
B.1/3-1/4
D.1/5-1/6
C.1/9-1/10