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【单选题】
听力原文: The woman's liberation movement has become an important social movement throughout much of the world today. In the past few decades, it has become one of the most important social movements in the US. Women have been fighting for equal tights hi the U.S. since early 1900s, but it was really in the 1960s and 70s that women began to gain equal fights and treatment in the fields of politics, education, employment, and the home. As for tile field of politics, today's politicians are well aware that women have become a powerful political force in the country. One of the reasons for this is that there are about 70 million women of voting age. There are, in fact, 7 million mom women of voting age than there are men of voting age in the U.S. today. As far as the field of employment is concerned, about 42 percent of the entire American work force today is made up of women there are 38.8 million women workers. In contrast, back in 1900, only 20 percent of the country's work force was made of women. This seems to indicate that greater numbers of today's women are managing to combine careers outside file home with file traditional roles of wife, mother, and homemaker. Years ago, you see, it wins customary for women to work outside the home only until they got married or until they had children. Nowadays, many women are continuing to work after they marry, and even after they have had children. (33)
A.
Late 1950s.
B.
Late 1900s.
C.
1960s to 1970s.
D.
1980.
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【多选题】下图告诉我们( )。
A.
当站表中没有某个节点的“端口—站地址表”信息。而这个节点正好是目的地址的数据帧,这时网桥无法决定应该从哪个端口转发。
B.
它唯一的办法就是在所有端口进行广播,只要这个节点在互联的局域网中,广播的数据帧总会到达目的节点。
C.
这种方法非常简单,但是却带来很大的问题,那就是1个帧经过一轮又一轮的广播后,变成2个、4个、8个、16个……这种盲目广播会使帧的数量按指数规律增长,造成网络中无用的通信量剧增,形成“广播风暴”,情况严重时会造成系统无法正常工作。
D.
环状结构可能使网桥反复转发同一个帧,从而增加了网络中不必要的负荷,进而降低系统性能。
【判断题】关系模型的一个特点是,实体以及实体之间的联系都可以用相同的结构类型来表示。
A.
正确
B.
错误
【单选题】下列关于流通加工的说法中,错误的是( )。
A.
加工是改变物质的形状和性质、形成一定产品的活动
B.
流通是改变物质的空间状态与时间状态
C.
流通与加工属于同一范畴
D.
流通加工指在流通过程中辅助性的加工活动
【单选题】凹形竖曲线最小长度和极限最小半径的确定,主要考虑的因素有( )
A.
行程时间、纵距
B.
行程时间和缓和行车冲击
C.
行程时间和视距
D.
视距和切线长
【单选题】在可靠性度量指标中,( )是指对维修产品在规定条件下使用,在规定维修条件下修理,在规定的时间内具有或维持其规定功能处于正常状态的概率。
A.
有效度
B.
维修度
C.
可靠度
D.
故障率
【判断题】产品的可靠度是指产品在规定条件下和规定时间内,完成规定功能的概率( ) 。
A.
正确
B.
错误
【单选题】图2告诉我们( )
A.
信息节食拒绝网络
B.
网络百害无一利
C.
网络推动社会进步
D.
沉迷网络危害大
【简答题】测量交流电压时,应用 和 仪表。
【判断题】关系模型的一个特点是,实体以及实体之间的联系都可以使用相同的结构类型来表示
A.
正确
B.
错误
【单选题】Which bus should the man take to get to Prince Street?
A.
Bus No. 12.
B.
Bus No. 30.
C.
Bus No. 13.
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