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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】直线插补指令是
A.
G00
B.
G01
C.
G02
D.
G03
【多选题】如果座面过深 ,则( )
A.
背部支撑点悬空,使靠背失去作用
B.
膝窝处会受到压迫,使小腿产生麻木感
C.
大腿前部悬空,将重量全部压在小腿上,使小腿很快疲劳
【单选题】直线插补指令是
A.
G00
B.
G01
C.
G02
D.
G90
【单选题】直线插补指令是
A.
G01
B.
G02
C.
G03
D.
G04
【简答题】直线插补指令 是
【单选题】直线插补指令是()
A.
G00
B.
M30
C.
T0101
D.
G01
【单选题】在立式铣床上,将螺旋齿离合器的底槽加工后,用立铣刀铣削螺旋面时,应将工件转( ),使将要被铣去的槽侧面处于垂直位置。
A.
90°
B.
180°
C.
270°
D.
360°
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A.
不假思索     拒之门外     毋庸置疑     不拘一格
B.
深思熟虑     扫地出门     不容置疑     打破常规
C.
不假思索     拒之门外     不容置疑     不拘一格
D.
深思熟虑     扫地出门     毋庸置疑     打破常规
【单选题】在立铣上将螺旋齿离合器的底槽加工后,用立铣刀铣削螺旋面时,应将工件( )使将要被铣去的槽侧面处于垂直位置。
A.
转过180°
B.
转过90°
C.
处于原来位置
D.
转过45°
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