【单选题】下列叙述,不正确的是?
A.
儿童最初几年,几乎全部骨髓均参与造血活动,即全为红骨髓。
C.
到18岁以后,红骨髓只限于颅骨、脊椎骨、肋骨、胸骨、髂骨以及长骨的近心端。
D.
在做骨髓穿刺或活检时, 2岁以下的幼儿 可选择的部位是髂骨、脊突、胸骨等处,胫骨粗隆则只适用于 成人 。
【多选题】下列关于防火墙的描述,正确的是()。
B.
是Internet网和内部网之间采取的一种安全措施
【简答题】Mr Smith is an English man. He teaches English well. His English classes are very interesting. He likes us and we like him, too. Mr Smith has two children-Tom and Mary. Tom is seven and his sister, Ma...
【简答题】阅读理解。 Mr Green is a teacher of English . He comes from America . He teaches English in China. He speaks English quite well. He reads a lot of books and his wife Mrs Green often writes book for the stu...
【单选题】下列关于防火墙的描述 , 不正确的是:
B.
防火墙的主要工作原理是对数据包及来源进行检查,阻断被拒绝的数据
D.
尽管利用防火墙可以保护网络免受外部黑客的攻击,但其目的只是能够提高网络的安全性不可能保证网络绝对安全
【多选题】现代疾病观对疾病的认识包括()
A.
身体器官的功能与组织结构的损害和系统之间的联系
【简答题】A.He is fond of English dishes. B.He is tired of puddings and pies. C.He enjoys English strawberry yogurt. D.He seldom has breakfast at home.
【单选题】What does he do ?He is a teacher. He English. [ ]