在区间[-1,2]上随机取一个数x,则x∈[0,1]的概率为 .
∵区间[-1,2]的区间长度为3,区间[0,1]的区间长度为1,∴由几何概型概率计算公式知x∈[0,1]的概率为.
— Do you know ?
— Sorry, I don’t have a watch.
A. whose watch this is
B. whose watch is this
C. what time it is
D. what time is it
影响旋翼拉力因素有哪些?