钻遇大裂缝或溶洞时,由于钻井液密度比天然气密度大而导致天然气侵入井内的现象称之为()

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问题:

钻遇大裂缝或溶洞时,由于钻井液密度比天然气密度大而导致天然气侵入井内的现象称之为()。

A.岩屑气侵

B.置换气侵

C.扩散气侵

C.气体溢流

考点:钻井液工考试高级钻井液工高级钻井液工题库
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下列哪项不属金银花的适应证()

A.外感风热表证

B.疮痈疖肿

C.热毒泻痢

D.热入营血

E.风寒湿痹

题型:单项选择题

Several years ago, a student working on a research project in my laboratory approached me with concern.“I’m doing something wrong,”she exclaimed. I had seen her research results and knew she was making good progress, so I was surprised to hear that she was having a problem. Over the next several days we went through her experiment; yet I could not find a problem. Finally, I asked her,“Why do you think you’re doing something wrong?” “Because I’m not getting what you said I should get,”she replied with some confusion.

Her response shocked me. I had not told her what she“should get”, but we had discussed some published hypotheses(假说) several weeks earlier. On seeing the research data that did not fit these predictions, I recognized that she had a new finding and came to change my hypotheses. But she was interpreting her results as a mistake. With almost four years of a college science major behind her, this student still had the common misunderstanding that science is a boring exercise in proving something we already know to be true.

But how can this happen? Throughout school, science is often described in textbooks as a series of“known”facts and figures; for example, DNA is a double helix; earthquakes occur at plate boundaries, etc. Unfortunately, the process by which these discoveries were made and how they fit into scientific progress are often ignored in the classroom. These details help show the nature of scientific discoveries and the tails help show the nature of scientific discoveries and the skepticism(质疑) that goes with new discoveries before they are accepted.

Understanding science is more than memorizing that DNA is a double helix. It is to have the ability to take in new information on diet, exercise, or disease and apply it to our own lives. Understanding the process of science and scientific problem-solving can help us make better decisions every day.

小题1:The student thought her research project had gone wrong because       .

A.she was not making progress

B.her teacher told her so

C.she couldn’t get enough data

D.she had some unexpected findings小题2:How did the writer feel when he found out the reason for the student’s confusion?

A.Confused.

B.Surprised.

C.Excited.

D.Pleased.小题3:What is to blame for the student’s misunderstanding about science?

A.Her own carelessness.

B.Her teacher’s lack of experience.

C.The method of science education.

D.The publication of some wrong hypotheses.小题4:What is the last paragraph mainly about?

A.The meaning of understanding science.

B.How to use known facts.

C.The best way to make scientific discoveries.

D.How to use scientific knowledge in daily life.

题型:单项选择题

下列法律中属于商事主体法的是()。

A.继承法

B.婚姻法

C.合同法

D.公司法

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可以用水洗的方法清除主滚筒表面附着物使其保持清洁()

题型:单项选择题

离子交换树脂的活性基团越易电离,树脂的溶胀率越()。

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