各型钢质弹簧支承圈不足()圈或圆钢直径腐蚀磨耗大于原型()时更换。

题型:填空题

问题:

各型钢质弹簧支承圈不足()圈或圆钢直径腐蚀磨耗大于原型()时更换。

考点:钳工技能考试车辆钳工技师车辆钳工技师题库
题型:填空题

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:填空题

机动车维修经营者应当公布机动车维修(),合理收取费用。

A.技术标准

B.工时定额

C.管理制度

D.工时单价

题型:填空题

电缆敷设时,应在电缆盘处配有可靠的(),应防止电缆敷设速度过快及电缆盘倾斜、偏移。

A.固定装置

B.稳定装置

C.加速装置

D.制动装置

题型:填空题

为什么在输送油品前要通前线?

题型:填空题

停经10周, * * 出血3天,子宫大小符合妊月,子宫口未开,属哪种流产?()

A.感染性流产

B.稽留性流产

C.先兆性流产

D.难免流产

E.不全流产

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