A:可以共享的
B:需依附一定载体的
C:可以增值的
D:具有实效性
— Would you like some juice?
— ________. I'd like something to eat.
13-6=____
50-30=____
8+92=____
7+7+7+7=____
100m-10m=____m
40cm-16cm=____cm