皮皮学，免费搜题
登录
搜题
【简答题】
Lesson 5 Listen and repeat-7
手机使用
分享
复制链接
新浪微博
分享QQ
微信扫一扫
反馈参考答案：
举一反三
【简答题】Can you draw a Family Tree?
【单选题】Before you pick up your phone, you should be mentally prepared. Which mental status is not good before you make a business call?
A.
You feel positive about the call.
B.
You take this phone call as a serious thing.
C.
You feel nervous before you make the call.
D.
You think you are responsible for this call.
【简答题】软齿面齿轮传动设计时,为何小齿轮的齿面硬度应比大齿轮的齿面硬度大 30 ~ 50 HBS ?
参考解析：
知识点：
题目纠错 0
发布
