用范成法切制渐开线齿轮齿廓时,若用同一把刀具加工齿数均相同的标准齿轮、正变位齿轮和负变位齿轮,在分度圆上()不变。
A.齿厚
B.齿槽宽
C.齿距
参考答案:C
My name is Jake Hill. My Chinese teacher is Yang Bin. is from Shanghai. He has children, a son and a daughter. are twins. The son is Yang Chen. The is Yang Xi. Mr Yang and his son in Nanjing, but his wife Chao Feng is in Shanghai. She is a ,she works in a hospital. Mr Yang’s daughter is in England. She is a college(大学)student.Yang Chen and I _ the same college. He likes scoccer ball.We are classmates and we are good . I teach him English and he teaches me
小题1:A. His B. Him C. He
小题2:A. two B. three C. four
小题3:A. Them B. They C. Their
小题4:A. wife B.son C. daughter
小题5:A. is B. am C. are
小题6:A. teacher B.doctor C. writer
小题7:A. go to B. to C. goes to
小题8:A. playing B.plays C. play
小题9:A.friend B.friends C. student
小题10:A. English B. China C. Chinese
唐代书法家怀素与张旭合称为“颠张醉素”。[ ]