As consumers' incomes increase, the demand for ground beef decreases. Ground beef is called a(n):
A、substitutegood.;
B、complementgood.;
C、normalgood.;
D、inferiorgood.
发布时间:2025-09-19 03:33:47
A、substitutegood.;
B、complementgood.;
C、normalgood.;
D、inferiorgood.