问题
单项选择题
下列属于柔性接口的是( )。
A．油麻石棉水泥接口
B．胶圈石棉水泥接口
C．油麻膨胀水泥砂浆接
D．油麻青铅接口
答案
参考答案：D
解析：承插式铸铁管接口分为刚性接口和柔性接口，而柔性接口又分为油麻青铅接口、人字柔口、梯唇式橡胶圈接口。
搜题请搜索小程序“爱下问搜题”
下列属于柔性接口的是( )。
A．油麻石棉水泥接口
B．胶圈石棉水泥接口
C．油麻膨胀水泥砂浆接
D．油麻青铅接口
参考答案：D
解析：承插式铸铁管接口分为刚性接口和柔性接口，而柔性接口又分为油麻青铅接口、人字柔口、梯唇式橡胶圈接口。
| 完形填空。 | ||||
| There is a woman named Atsuko Saeki. When she wasa teenager, she dreamed of going to the United States. Most of what she knew about American 1 was from the textbooks she had read. "I had a 2 in mind: Daddy watching TV in the living room, Mummy baking cakes and their teenage daughter off to the cinema with her boyfriend." Atsuko 3 to attend college in California. When she arrived, however, she found it was not her 4 world. "People had difficulty in doing something and often seemed uneasy," she said. "I felt very lonely." One of her hardest 5 was physical education."We played volleyball," she said. "The other students were good at it, but I wasn't." One aftemoon,the instructor asked Atsuko to 6 the ball to her teammates so they could knock it 7 the net. No problem for most people, but it frightened Atsuko. She was afraid of losing face 8 she failed. A young man on her team realised what she was going through. "He walked up to me and said, Come on. You can do that. " "You will never understand how those words of 9 made me feel Four words: You can do that. I felt like crying with happiness. She made it through the class. Perhaps she thanked the young man; she is not 10 . Six years has passed. Atsuko is back in her country, working as a salesclerk. "I have never forgotten the words," she said. "When things are not going so well, I think of them." She is sure the young man had no idea how much his kindness 11 to her. " He probably doesn't even remember it," she said. That may be the lesson. Whenever you say something to a person-cruel or kind - you have no idea how long the word will 12 . She's all the way over in Japan, but still she hears those four simple words: You can do that. | ||||
|