皮皮学，免费搜题
登录
搜题
【单选题】
三角螺纹的摩擦 1 矩形螺纹的摩擦,因此,前者多用于 2 。A.
1:大于 2：紧固联接
B.
1:小于 2: 传动
C.
1:等于 2：紧固联接
D.
1:等于 2：传动
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
【单选题】We regret having received your offer too late, BECause we ____ our needs elsewhere.
A.
already cover
B.
already covered
C.
have already cover
D.
had already covered
【单选题】We regret to ________ you that our library will be closed next Wednesday, Thursday and Friday for the sports meeting. [ ]
A.
say
B.
speak
C.
inform
D.
notice
【单选题】If we ________ now to protect our mother river ---Li Jiang River , we ‘ll live to regret it.
A.
haven’t acted
B.
won’t act
C.
don’t act
D.
hadn’t acted
相关题目：
参考解析：
知识点：
题目纠错 0
发布
