【简答题】阅读理解 Do you want to have a pen pal? Now let me tell you how to get a pen pal. The first step is saying “Hello” or “ How are you?”. In this step, you and your new friend say hello to each other and tea...
【简答题】螺纹连接的预紧,目的是为了增强连接的 ,提高紧密性和防松能力,确保连接安全可靠。
【判断题】装配时,绝大多数螺纹连接需要预紧,预紧的目的是为了增大连接的紧密性和可靠性,但不能提高螺栓的疲劳强度。
【判断题】螺纹连接预紧的目的在于增强连接的可靠性和紧密性,以防止受载后被联接件间出现缝隙或发生横向滑移。( )
【判断题】螺纹连接预紧的目的是为了增强连接的可靠性和紧密型,防止受载后被连接件间出现缝隙或发生相对滑动。
【单选题】If you want to make friends, the first step to make is to ______.
A.
go to others and shake hands
B.
go to others and say 'Hello'
C.
remember people's names