题干
( ) Let's put the magnet (磁铁)near the nails.
A：The nails all stick to it.
B：All the nails fall on the floor.
答案(点此获取答案解析）
A
( ) Let's put the magnet (磁铁)near the nails.
A：The nails all stick to it.
B：All the nails fall on the floor.
