题目

听下面一段较长对话，回答以下小题。【1】How many bedrooms does the house on Sunshine Street have?A.2. B.3. C.4.【2】What is an advantage of the house on Candy Bar Street?A.Large parking lots. B.Extremely low rent. C.Good public transport.【3】What is the probable relationship between the speakers?A.Friends. B.Workmates. C.Husband and wife. 答案：【答案】【1】B【2】C【3】C【解析】【原文】W: Well, honey, which one do you prefer? The one on Sunshine Street or the one on Candy Bar Street?M: Oh, it’s really difficult to choose. They’re both nice.W: Let me see… Do we really need four bedrooms? If you can accept a house with three bedrooms, we can choose the one on Sunshine Street.M: Actually, I don’t mind having three 干细胞移植现已成为冶疗糖尿病的一种临床技术。自体骨髓干细胞植入胰腺组织后可分化为胰岛样细胞，以替代损伤的胰岛B细胞，达到治疗糖屎病的目的。下列叙述正确的是A．骨髓干细胞与胰岛样细胞的基因组成相同，基因表达产物不同 B．骨髓干细胞与胰岛样细胞的基因组成不同，基因表达产物不同 C．胰腺组织微环境造成骨髓干细胞基因丢失，分化成为胰岛样细胞 D．胰腺组织微环境对骨髓干细胞分化无影响，分化是由基因决定的