解:函数g(x)=ax2﹣2ax+1+b(a>0),
∵a>0,对称轴为x=1,所以g(x)在区间0,3上是先减后增,
又g(x)在区间0,3上有最大值4和最小值1.
故g1<
为了帮助中国游客养成绿色旅游的习惯,政府制定了新规则。
The government has made new rules to help Chinese tourists to ____________________ of traveling in a green way.
下列能源中,属于可再生能源的是()