安装在洗手间内的塑料制卫生纸架

已知在□ABCD中，点A（1，1），B（2，3），CD的中点为E（4，1），将

□ABCD按向量a平移，使C点移到原点O.

（1）求向量a；

（2）求平移后的平行四边形的四个顶点的坐标.

Do you like Home with Kids (《家有儿女》)? It is very popular (受欢迎的) now. many children like it. There is a sister and two brothers in their family.

Father doesn’t do housework often. He is always happy. Mother loves her children, but she gets angry easily. Sister, Xiao Xue, is a good student. Big brother, Liu Xing, can always make other happy. He likes ball games. Little brother, Xiao Yu, is helpful. He likes playing computer games.

根据短文内容，判断正（T）误（F）

小题1:There are five people in the family.

小题2:Father often does housework.

小题3:Xiao  Xue isn’t a good student.

小题4:Liu Xing likes playing computer games.

小题5:Xiao Yu has a brother and a sister.

患者男，34岁。在第1次献血时被告知肝生化值异常。病毒性肝炎血清学结果阴性。碱性磷酸酶水平为正常值上线的3倍。丙氨酸氨基转移酶和天冬氨酸氨基转移酶值为正常值上限的2倍。肝、胆超声正常。接下来9个月肝生化指标持续异常。内镜逆行性胆胰超声显示肝周围及肝内管道多发弥散结构。再次询问了患者的排便习惯。多年来排便一直规律，2次/d，半成形便。偶尔便后有血，乙状结肠镜检查显示所及范围内仅有轻微改变，以血管纹理丧失及颗粒状改变为主。有小的痔疮灶。活检显示轻度活动性慢性结肠炎。不正确的建议是（）

A.CT检查近端结肠

B.结肠镜检查同时监测性活检取材，每1～2年重复检查

C.8年内监测性结肠镜检查，每1～2年检查1次

D.补充叶酸

E.粪便DNA取样

工业上制取大量氧气的原料是______，原理是利用液态氮和液态氧的______不同加以分离，实验室和工业上制得氧气在原理上的本质区别是：前者属于______变化，后者属于______变化．

躯干后伸主动肌是（）

A.竖脊肌

B.半脊肌

C.多裂肌

D.腰方肌

E.背阔肌