零件损坏的主要原因是磨损、疲劳、冲击振动、腐蚀老化及火花烧损。
参考答案:对
阅读短文,判断正误。对的写“Y”,错的写“N”。
Hello! I am Zhang Wei. I am a primary school (小学) student. I am in Class Two, Grade Three. There are
200 students and many good teachers in our school. My math teacher is Mr. Liu. He is young and strong. Mrs.
Han is my Chinese teacher. She is not very young. Miss Guo is my English teacher. She is young and pretty. I
love music. My favourite colour is blue. My favourite teacher is Miss Chen, my music teacher. She is funny
and kind. Sometimes she tells (讲) us many stories about music. I study hard.
( ) 1. Zhang Wei is a student.
( ) 2. Zhang Wei only has two teachers.
( ) 3. Mr. Liu is his English teacher.
( ) 4. His math teacher is old but strong.
( ) 5. His music teacher is funny and kind.
( ) 6. He doesn't like studying music.
某企业采用单对象流水线进行生产组织,该流水线日产品产量为101件,每日工作8小时,时间有效利用系数为0.95,废品率为0,流水线的第i道工序计算所需某精密设备为6台,实际只有5台该设备进行生产。
该企业所应用的生产过程空间组织形式是()
A.固定布置
B.工艺专业化布置
C.对象专业化布置兮
D.混合式布置