-- What do you need for dinner?
-- I want some carrots and beef.
A:buy
B:buys
C:buying
D:to buy
12的因数有____
10的倍数有____个.
60以内15的倍数有____
既是16的倍数又是16的因数的数是____
(从小到大填写)
不等式x-1≤0的解集为( )