7□4÷7,要使商的中间有0,□里可以填______.
只要□中数字比7小就可以,所以,□中数字可以是:0、1、2、3、4、5、6.
故答案为:0、1、2、3、4、5、6.
若A={x|(x-1)2<2x-4},则A∩Z的元素个数为______.
The people upstairs __________ when I __________ to sleep last night.[ ]
A. danced; was going
B. were dancing; got
C. had danced; went
D. are dancing; get