题干
—— Dad, where is Mom?—— She the supermarket.
A：has gone to
B：has been to
C：is going to
答案(点此获取答案解析）
A
—— Dad, where is Mom?—— She the supermarket.
A：has gone to
B：has been to
C：is going to
定范围内细胞膜外某物质浓度变化与该物质进入细胞膜内速度的关系，下列关于该物质的说法，正确的是 （ ）
