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【单选题】
Changes in Marriage and Family More surprising, perhaps, than the current difficulties of traditional marriage is the fact that marriage itself is alive and thriving. As Skolnick notes, Americans are a marrying people, relative to Europeans, more of us marry and we marry at a younger age. Moreover, after a decline in the early 1970s, the rate of marriage context. some 80 percent of divorced individuals remarry. Thus, marriage remains, by far, the preferred way of life for the vast majority of people in our society. What has changed more than marriage is the nuclear family. Twenty-five years ago, the typical American family consisted of a husband, a wife and two or three children. Now, there are many marriages in which couples have decided not to have any children. And there are many marriages where at least some of the children are from the wife's previous marriage' or the husband' s, or both. Sometimes these children spend all of their time with one parent from the former marriage; sometimes they are shared between the two former spouses(配偶)。 Thus, one can find every type of family arrangement. There are marriages without children: marriages with children from only the present marriage;marriages with 'full- time' children from both the present and former marriages: marriages with 'full-time' children from the present marriage and 'part-time' children from former marriages. There are stepfathers, stepmothers, half-brothers and half-sisters. It is not all 'that unusual for a child to have four parents and eight grandparents! These are enormous changes from the traditional nuclear family. But even so, even in the midst of all this, there remains one constant: most Americans spend most of their adult lives married. 第 57 题 By calling Americans marrying people the author means that_____ A.Americans are more traditional at than Europeans
B.
Americans expect more out of marriage than Europeans
C.
there are more married couples in U.S.A.than in Europe
D.
more of Americans, as compared with Europeans,prefer marriage and they accept it at a younger age
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【单选题】单面搭接焊缝焊缝长度为( )。
A.
4d(5d)
B.
8d(10d)
C.
2d(2.5d)
D.
3d(6d)
【单选题】下列关于元素电离能大小顺序叙述错误的是()。
A.
第一电离能: Na
B.
第二电离能:N a>Mg
C.
最外层具有ns 2 np 1 构型的原子: I 1 2 3≤I 4
D.
最外层具有ns 2 构型的原子: I 1 ≤I 2 3 4
【简答题】请完成实验1,并上传实验报告。
【简答题】(11分) (1)、下表是一些短周期元素的气态原子失去核外不同电子所需的能量(kJ·mol -1 ): 通过表中的数据分析为什么锂原子失去核外第二个电子时所需的能量要远远大于失去第一个电子所需的能量 , X在周期表中位置:第 期, 族,Y的最高正价为 。 (2)1932年美国化学家鲍林(L.Pauling)首先提出了电负性的概念。电负性(用X表示)也是元素的一种重要性质,下表给出的是原子序数小于2...
【简答题】组成生命细胞的11种常量元素(约占人体总质量的99.97%),全部位于周期表的前20号.其中组成人体蛋白质、脂肪、碳水化合物和核酸的主要有6种元素. (1)这六种元素中除H、C、O、P、S外,应该还有______(写元素符号),它的基态原子核外电子排布式是______,其第一电离能比O的______(填“大”或“小”);与它同周期,且单质熔点最高的元素在周期表中的位置______. (2)CO 2...
【单选题】临床上脑水肿伴心功能不全者宜选用 ( ) 。
A.
甘露醇
B.
呋塞米
C.
氨苯蝶啶
D.
氯噻酮
E.
高渗葡萄糖
【多选题】按照触摸屏的工作原理和传输信息的介质,触摸屏可分为( )。
A.
电阻式
B.
电容式
C.
红外线
D.
表面声波
【多选题】按照工作原理和传输信息的介质,触摸屏可分为( )类。
A.
电阻式
B.
电容式
C.
红外线式
D.
表面声波式
【简答题】按照触摸屏的工作原理和传输信息的介质,可以将触摸屏分为
【单选题】钢筋搭接焊时,焊缝长度应符合( )。(d为钢筋直径)
A.
双面焊缝长度不得小于5d,单面焊缝长度不得小于lOd
B.
双面焊缝长度不得小于lOd,单面焊缝长度不得小于5d
C.
单、双面焊缝均不得小于5d
D.
单、双画焊缝均不得小于lOd
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