若函数y=2x-3的图象经过（1，a），（b，2）两点，则a=______，b=

下列各组化合物中，同种元素化合价不相同的是（　　）

A．H₂O和HCl

B．Fe₂O₃和FeCl₃

C．CuCl₂和CuSO₄

D．KClO₃和KClO

某医院儿科收治了一名高热患儿，经医生初诊"发热待查，脑炎可能"。急诊值班护士凭多年经验，对患儿仔细观察，发现精神越来越差，末梢循环不良，但患儿颈部不强直。于是，护士又详细询问家长，怀疑是中毒性菌痢。经肛门指诊大便化验，证实为菌痢，值班护士便及时报告医生，经医护密切配合抢救，患儿得救。

该护士的行为符合下列哪条道德要求（）

A.举止端庄，言语文明

B.作风严谨，准确无误

C.平等待人，尊重病人

D.敬业负责，精益求精

E.关心病人，体贴入微

在此次挂牌出让过程中，不符合《招标拍卖挂牌出让国有土地使用权规定》的行为是( )。

A．挂牌公告时间与挂牌时间不一致

B．向社会公布国有土地使用权出让计划

C．挂牌时间超过了10个工作日

D．因公布挂牌出让结果，而向受让人收取公布费用

通货膨胀缺口

The concept of the family is difficult to define. Part of the difficulty is that in everyday language, the term family is used to describe a number of relationships. These range from the biological, nuclear family of mother, father, and child and siblings, to the more extended family which includes several generations of blood relatives or relatives through marriage, to close and intimate friends, even to humankind, or the "family of man. "

The wide variation in everyday usage is less apparent in formal definitions, but even here there is a lack of consensus. Formal definitions do not always fit informal definitions. The U. S. Bureau of the Census, which collects information used by social scientists, defines family as "a group of two or more person related by blood, marriage, or adoption and residing together in a household. " A household is comprised of "all persons who occupy a housing unit, that is, a house, an apartment, or other group of rooms, or a single room that constitutes separate living quarters. " This definition considers the family in terms of only its structure and legal status, not the qualities of the relationship or its functions or activities. The Census Bureau thus would accept as a family two legally related people who hated each other and were just living together for their mutual economic advantage. Their definition also includes sexual and nonsexual relations; married women and men living together in sexual unions are families, but so are brothers and sisters living together in nonsexual unions.

Many social scientists often distinguish between the family of origin and the family of procreation (生殖, 生产). Most of us are simultaneously members of two families: the family of origin, into which we are born and of which we are always considered a member, even if we leave it, and the family of procreation, which we join as adults for the purpose of procreation and rearing children. Some social scientists also distinguish marriage from family and see the two as independent of one another. They argue that the family can exist regardless of whether the couple is married. They see marriage as a public ceremony which joins together two kinship groups and in so doing lays out some important rights over children, domestic authority, and sexual matters. Marriage is also the ritual through which children are made legitimate in the eyes of the parents and the society. Marriage therefore is a social ceremony, whereas family need not be.

According to the Census Bureau’s definition, which of the following is NOT a relation in a family().

A. Blood relation.

B. Marriage.

C. Adoption.

D. Friendship.