When he returned from his vacation,he found his apartment____and a lot of things____.
A:breaking into;stealing
B:broken into;stolen
C:breaking in;stolen
D:broken in;stealing
中纬度地区四季分明。
如图,矩形OABC内的阴影部分是由曲线fx=sinx,x∈0,π 及直线x=a,a∈0,π与x轴围成,向矩形OABC内随机投掷一点,若落在阴影部分的概率为14,则a的值是( )