水基压裂液中，加入助排剂的作用是（）。A.增加压裂液粘度 B.增强携砂能力 C.杀死 发布时间：2019-08-16 10:25 │ 来源：www.tikuol.com 题型：单项选择题 问题： 水基压裂液中，加入助排剂的作用是（）。A.增加压裂液粘度B.增强携砂能力C.杀死细菌微生物D.降低表面张力和界面张力
题型：单项选择题 It is often observed that the aged spend much time thinking and talking about their past lives, (1) about the future. These reminiscences are not simply random or trivial memories, (2) is their purpose merely to make conversation. The old person’s recollections of the past help to (3) an identity that is becoming increasingly fragile: (4) any role that brings respect or any goal that might provide (5) to the future, the individual mentions his past as a reminder to listeners, that here was a life (6) living. (7) , the memories form part of a continuing life (8) , in which the person (9) the events and experiences of the-years gone by and (10) on the overall meaning of his or her own almost completed life. As the life cycle (11) to its close, the aged must also learn to accept the reality of their own impending death. (12) this task is made difficult by the fact that death is almost a (13) subject in the United States. The mere discussion of death is often regarded as (14) .As adults many of us find the topic frightening and are (15) to think about it — and certainly not to talk about it (16) the presence of someone who is dying. Death has achieved this taboo (17) only in the modern industrial societies. There seems to bean important reason for our reluctance to (18) the idea of death. It is the very fact that death remains (19) our control; it is almost the only one of the natural processes (20) is so.A．keepsB．drawsC．inclinesD．tends 查看答案
题型：单项选择题 成人检查应用（）。A.内径3.5～4.0mm的支气管镜B.内径4.0～4.5mm的支气管镜C.内径5.0mm的支气管镜D.内径5.0～7.0mm的支气管镜E.内径7.0～9.0mm的支气管镜 查看答案
题型：单项选择题 东风汽车修配厂与机械进出口公司签订购买价值3000万元测试设备的合同，为购买此设备向工商银行签订借款1500万元的借款合同。后因故购销合同作废，改签融资租赁合同，租赁费800万元。根据上述情况，该厂一共应缴纳印花税为( )。A．9000元B．750元C．400元D．10150元 查看答案
