单项选择题
细长轴加工时由于其刚性差，因而加工难度比一般轴大。
未知题型细长轴加工时由于其刚性差，因而加工难度比一般轴大。
7. 三通 A. links of communication, transportation and tra...
单项选择题7. 三通 A. links of communication, transportation and trade B. three links
What will be discussed in a business negotiation?A、pric...
单项选择题What will be discussed in a business negotiation?
