A.r/a/dium
B.gr/a/duation
C.r/a/dioactive
D.ur/a/nium
A.radio/a/ctive
B.ur/a/nium
C.r/a/dium
D.cour/a/ge
What does Paragraph 4 mainly describe?
A.The challenges the person faced.
B.The person" s gratitude to the master.
C.The changes experienced by the person.
D.The person" s understanding of the task.
A.Nu:待定准数
B.Re:流体的流动型态对对流传热的影响
C.Pr:流体物理性质对对流传热的影响
D.Gr:自然对流对对流传热的影响