说明钻液一周的循环流程?
参考答案:
钻井液泵→地面管线→立管→水龙带→水龙头→方钻杆→钻具→钻头→环形空间→钻井液槽→振动筛→钻井液罐→钻井液泵
如图,阅读下列材料:(10分)
“在地球另一角落里有着一个人间奇迹,它叫夏宫。……人们的想像力所能创造的一切几乎神话性的东西都体现在这座宫殿中。……有一天,两个强盗闯入了夏宫,一个动手抢劫,一个把它付之一炬。原来胜利就是进行一场掠夺。胜利者窃走了夏宫的全部财富。……之后,他们双双拉着手,荣归欧洲。”
请回答:
⑴材料中的“夏宫”是指什么?它是在哪一次战争中被焚毁的?(4分)
⑵材料中的“两个强盗”是指谁?(2分)
⑶这场战争给中国造成了什么严重影响?清朝形成了怎样的社会局面?(4分)
Suppose a foreign friend of yours has written to inquire about the possibility of making a seven-day visit in China. Write a reply to give him some information. The following should be included: (1) The place you recommend for him to visit and the reasons ; (2) The suggested route and the timetable of the visit; (3) Some advice on how he should prepare for the visit; (4) Your arrangement for his visit to Beijing.