A：交通地图
B：旅游地图
C：遥感地图
D：电子地图
读句子，将问句和答句连线。
①Whose dress is it? ____ A. It's pink.
②What colour is the shirt? ____ B. It's under the sofa.
③Is this your shirt, Dad? ____ C. No, it isn't.
④Where's my hat? ____ D. It's my sister's.
下列方程中，关于x的一元二次方程是（ ）
