Provides surface for applying force on machinery
Provides landing surface for the sounding bob
Absorbs machinery vibration
Prevents valve stem over-travel
第1题：
第2题：
In Hammer’s five-step model, the purpose of “elicitation” is to provide the teacher with feed back as to what to do next.（）
A对
B错
第3题：
The purpose of two questions in the second paragraph is to ________.
[A] demonstrate why people are amused
[B] display what people laugh at
[C] bring to light the phenomenon of laughter
[D] accent what a phenomenon laughter really is
第4题：
What is the primary purpose of IPS?（）
第5题：
What is the purpose of the Route Tag field in the RIPv2 message？
第6题：
第7题：
What is the purpose of an administrative distance？
第8题：
A.describe what you’ll be doing during the observation
B.schedule a meeting to discuss the observation
C.clarify the purpose of the observation
D.it’is not necessary to meet with your colleague or TA to discuss
第9题：
What is a key purpose of the Solutions Recommendation Guide?（）
第10题：
what is the purpose of classification？