_______ to ride a bike from your school to the park?
A:How long did you spend
B:How far did it take
C:How long did it take you
D:How far did you spend
(I)当 x∈−π2,π2 时,求函数f(x)的最大值和最小值;
(II)若 x∈(π2,π) ,且 f(x)=1,求cos(x+5π12) 的值.
关于交通运输网的正确叙述是( )
要了解明代农业和手工业生产技术以及手工工场的生产面貌,应推荐阅读( )