A:1
B:2
C:3
D:4
(1)They’ll return ____ (马上).(2)Could you please ____ (打扫干净) the room?(3)Would you like to ____ (与……聊天) others when you travel by train?(4)I’m sorry I couldn’t ____ (过会与……通话) you sooner.(5)You are supposed to____ (关掉) your mobile phones when having meetings.
10名工人某天生产同一种零件,生产的件数是15,17,14,10,15,17,17,16,14,12;设其平均数为a,中位数为b,众数为c,则有( )