泵送管道的敷设敷设向下倾斜的管道时，应在输出口上加装一段水平管，其长度不应小于倾斜管高低差的（）倍。
A.1
B.2
C.3
D.5
参考答案：D
改错。
( )1. How does you brother go to school? __________
A B C D
( )2. —How often is it from your home?
—Two miles. __________
( )3. Do you take your bike to work? __________
( )4. He often walks to school on foot. __________
( )5. It takes her half an hour clean her room. __________
把学习（）作为审查谈话第一课，让审查对象重读入党誓词，重温入党志愿书，用理想信念教育转化，唤醒激情燃烧岁月的记忆，使其认识错误，写出反思材料，真心向党忏悔。
A.党规
B.党纪
C.法律
D. * *
