《学术独立与新清华》认为：“（）是大学的灵魂。专教书而不研究，则所教的必定毫无进步。”
参考答案：研究
He is thinking of his business while his father is strongly against it for fear of the further positive effect of the global economic crisis. .
A．expanding
B．carrying
C．exploding
D．spreading
长方形的周长为10，一条边长为a-2b，另一边长是（ ）
A．5-a+2b
B．5+a-2b
C．10-a+2b
D．10-2a+4b
