【判断题】The main purposes of the Great Charter was to protect ordinary people.
【单选题】What are the main purposes of the park according to the speaker?
A.
research and entertainment
B.
research and education
C.
education and entertainment
【单选题】The main purposes of personal financial statements are to:
A.
Report your current financial position
B.
Measure your progress toward financial goals
C.
Maintain information about your financial activities
【单选题】One of the main purposes of refractories in a boiler furnace is to()
A.
help preheat the air for the furnaces
B.
help preheat the feedwater
C.
protect economizer from excessive heat
D.
prevent excessive furnace heat losses
【单选题】深度为10的二叉树至少有_______个结点。