题目

白血病是一种血液肿瘤，目前最有效的治疗方法是给患者进行骨髓移植，这是因为骨髓中含有（ ） A . 造血干细胞 B . 多能成体干细胞 C . 骨髓基质细胞 D . 胚胎干细胞 答案：A Spiders, bats.Black cats and more.Let's see what Halloween has in store!Halloween Party.Saturday, October 29th.7:00 p.m~Midnight, Food&Drink.652 Star Road, Sunshine Town.Please reply to Holly, Ken and Patrick Brown.555-6823.Costumes and children are welcome!1.This is party is for .A.Christmas B.Thanksgiving C.Halloween2.What can't you see at the party?A.Drink B.Food C.Lanterns