截止阀在管道上是有方向性的,若无箭头标注,应按“高进低处”的原则进行安装。
查看答案
Mark: Miss Wang, I want to 1 ___________ an evening train to Harbin so that I can get there the next morning. Do you know the schedule?Miss Wang: Yes. I have got a 2 _____________________ here.Mark: Is there a train leaving around 6?Miss Wang: 3 ___________ one at 6:15.Mark: When will it get there?Miss Wang: It will 4 ________ there at about 8:00 next morning.Mark: That’s the one I need. Thank you very much.Miss Wang: You are 5 ________________ .
俄国文学白银时代的作品中仍有人道主义思想。()
A. 对
B. 错
按照留装订边的格式,图纸左边应留出( )mm。
A. 25
B. 20
C. 15
D. 10