精车加工塑性金属时为避免积屑瘤的产生,常采用高速或低速切削。
参考答案:对
根据下列句子及所给单词的首字母,在答题纸上按题号写出各单词的完全形式(每空限填一词)。
小题1:Mary r a bike to school at 7:30 in the morning
小题2:He doesn’t like getting up early, I don’t, e_________.
小题3:The boy is old enough to get d .
小题4:Teachers find that one q________ of the students feel sleepy in class in spring.
小题5:He is good at music, so he wants to be a m__________ when he grows up.
小题6:John is good at w_________ stories for children.
小题7:There are about nine h___________ students in our school.
小题8:He brushes his t__________ before he goes to bed.
小题9:Jim, n___________ run in the hallways.
小题10:I’m sure your dream can come t________.
世界公认的最佳数比关系是黄金分割理论,基本含义是:两个因素的比值近似()。