A:脐带→胎盘→母体→胎儿
B:胎盘→脐带→母体→胎儿
C:母体→胎盘→脐带→胎儿
D:母体→脐带→胎盘→胎儿
She was really u____ about the way her father treated her.
Daming ____(go) to the Great Wall last weekend.