问题
单项选择题
锅炉的锅筒和水冷壁的下集箱及后棚管的后集箱最低处，排污阀及排污管道的连接方式为( )。
A．不得采用螺纹连接
B．不得采用法兰连接
C．采用螺纹或法兰连接
D．不得采用螺纹和法兰连接
答案
参考答案：A
搜题请搜索小程序“爱下问搜题”
锅炉的锅筒和水冷壁的下集箱及后棚管的后集箱最低处，排污阀及排污管道的连接方式为( )。
A．不得采用螺纹连接
B．不得采用法兰连接
C．采用螺纹或法兰连接
D．不得采用螺纹和法兰连接
参考答案：A
请先阅读下面短文，掌握其大意，然后根据短文内容从下面方框内的七个选项中，选择五个还原到文中，使短文意思通顺、结构完整，并写在答题卷上。(每小题2分) We all have days when we are down, tired and unhappy. That’s OK. You need days like this, or how would you know you are happy? 小题1: Even if sadness is a part of life, let’s try to make it small. Here are a few simple ways to help you feel better when you are feeling sad. 1.Stand up straight and this helps your energy flow（流动）.when your energy is flowing freely, you can flow too. 2. Smile! 小题2:This way can not only leave you in a good mood but also bring others a good mood. 3. Listen to music.小题3: some kinds of music work better than others. So try and find out what kind of music works the best for you. 4.Take some “me”time. You can find pleasure in reading a book, watching a sunrise or having a hot bath, or something like that. 5. Exercise. 小题4:It is a great way to clear your mind of anything that makes you sad. These ways will cheer you up when you are down, but don’t just use them when you are sad. Try and practice them everyday to make them a habit. 小题5:But if you are in a deep depression（沮丧）,go to see a doctor.
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