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【单选题】
如图，PA切⊙O于点A，割线PBC经过圆心O，OB=PB=1，OA绕点O逆时针方向旋转60°到OD，则PD的长为（　　）
A.
7
B.
31 2
C.
5
D.
2 2
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【判断题】权证是指持有人在规定期间内或特定到期日,有权按约定价格向发行人认购或出售标的股票的权利凭证
A.
正确
B.
错误
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【单选题】Which of the following, if newly discovered, would most seriously weaken the authors argument concerning the importance of virgin-soil epidemics in the depopulation of Native Americans?
A.
Evidence setting the pre-Columbian population of the New World at only 80 million.
B.
Spanish tribute records showing periodic population fluctuations.
C.
Documents detailing sophisticated Native American medical procedures.
D.
Fossils indicating Native American contact with smallpox prior to 1492.
E.
Remains of French settlements dating back to the sixteenth century.
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【单选题】Which of the following statements most accurately reflects the authors opinion about vase paintings?
A.
Evidence from written documents is older than evidence from vase paintings.
B.
The sources for vase paintings are clear because of the images on them.
C.
The details in vase paintings are not obvious because of their age.
D.
There is disagreement among scholars regarding vase paintings.
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【多选题】常见的螺纹联接形式有：
A.
螺柱联接
B.
螺钉联接
C.
螺栓联接
D.
键连接
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【单选题】Which of the following is the main reason of the authors advocacy of strengthening the rights and voice of the poor?
A.
The poor is and will be the main victim in water crisis.
B.
Most of the developing countries face water crisis while the developed ones do not.
C.
Water management is a system which guides the poor how to efficiently utilize water.
D.
Water crisis will lead to more competition between the rich and the poor.
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【单选题】Which of the following statements most accurately reflects the authors opinion about the process of modernization?
A.
Countries do not develop in isolation, but in a context of fierce international, political, and economic competition.
B.
Modernization in the third world may still be impeded by the legacy of colonial dependency.
C.
People in less developed countries are more likely to adopt an extended family system.
D.
A country's economic, social and cultural changes will speed up its process from a pre-industrial to industrial society.
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【单选题】Which of the following, if true, would most weaken the authors assertion that, in the 1970s, corporate response to federal requirements(lines 23 — 24)was substantial?
A.
Corporate contracts with minority-owned businesses totaled $ 2 billion in 1979.
B.
Between 1970 and 1972, corporate contracts with minority-owned businesses declined by 25 percent.
C.
The figures collected in 1977 under-represented the extent of corporate contracts with minority-owned businesses.
D.
The estimate of corporate spending with minority-owned businesses in 1980 is approximately $ 10 million too high.
E.
The $1.1 billion represented the same percentage of total corporate spending in 1977 as did $ 77 million in 1972.
查看完整题目与答案
【多选题】常见的螺纹联接形式有：
A.
键联接
B.
螺栓联接
C.
螺钉联接
D.
螺柱联接
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【简答题】认沽权证是指发行人发行的，约定持有人在规定期间内或特定到期日，有权按约定价格向发行人购买标的证券的有价证券。 （ ）
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【单选题】下面对钢筋混凝土结构抗震设计提出一些要求，试问，其中何项组合中的要求全部是不正确的? ①质量和刚度明显不对称的结构，均应计算双向水平地震作用下的扭转影响，并应与考虑偶然偏心引起的地震效应叠加进行计算。 ②特别不规则的建筑，应采用时程分析的方法进行多遇地震作用下的抗震计算，并按其计算结果进行构件设计。 ③抗震等级为一、二级的框架结构，其纵向受力钢筋采用普通钢筋时，钢筋的屈服强度实测值与强度标准值的比...
A.
①②
B.
①③④
C.
②③④
D.
③④
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相关题目：
【判断题】权证是指持有人在规定期间内或特定到期日,有权按约定价格向发行人认购或出售标的股票的权利凭证
A.
正确
B.
错误
查看完整题目与答案
【单选题】Which of the following, if newly discovered, would most seriously weaken the authors argument concerning the importance of virgin-soil epidemics in the depopulation of Native Americans?
A.
Evidence setting the pre-Columbian population of the New World at only 80 million.
B.
Spanish tribute records showing periodic population fluctuations.
C.
Documents detailing sophisticated Native American medical procedures.
D.
Fossils indicating Native American contact with smallpox prior to 1492.
E.
Remains of French settlements dating back to the sixteenth century.
查看完整题目与答案
【单选题】Which of the following statements most accurately reflects the authors opinion about vase paintings?
A.
Evidence from written documents is older than evidence from vase paintings.
B.
The sources for vase paintings are clear because of the images on them.
C.
The details in vase paintings are not obvious because of their age.
D.
There is disagreement among scholars regarding vase paintings.
查看完整题目与答案
【多选题】常见的螺纹联接形式有：
A.
螺柱联接
B.
螺钉联接
C.
螺栓联接
D.
键连接
查看完整题目与答案
【单选题】Which of the following is the main reason of the authors advocacy of strengthening the rights and voice of the poor?
A.
The poor is and will be the main victim in water crisis.
B.
Most of the developing countries face water crisis while the developed ones do not.
C.
Water management is a system which guides the poor how to efficiently utilize water.
D.
Water crisis will lead to more competition between the rich and the poor.
查看完整题目与答案
【单选题】Which of the following statements most accurately reflects the authors opinion about the process of modernization?
A.
Countries do not develop in isolation, but in a context of fierce international, political, and economic competition.
B.
Modernization in the third world may still be impeded by the legacy of colonial dependency.
C.
People in less developed countries are more likely to adopt an extended family system.
D.
A country's economic, social and cultural changes will speed up its process from a pre-industrial to industrial society.
查看完整题目与答案
【单选题】Which of the following, if true, would most weaken the authors assertion that, in the 1970s, corporate response to federal requirements(lines 23 — 24)was substantial?
A.
Corporate contracts with minority-owned businesses totaled $ 2 billion in 1979.
B.
Between 1970 and 1972, corporate contracts with minority-owned businesses declined by 25 percent.
C.
The figures collected in 1977 under-represented the extent of corporate contracts with minority-owned businesses.
D.
The estimate of corporate spending with minority-owned businesses in 1980 is approximately $ 10 million too high.
E.
The $1.1 billion represented the same percentage of total corporate spending in 1977 as did $ 77 million in 1972.
查看完整题目与答案
【多选题】常见的螺纹联接形式有：
A.
键联接
B.
螺栓联接
C.
螺钉联接
D.
螺柱联接
查看完整题目与答案
【简答题】认沽权证是指发行人发行的，约定持有人在规定期间内或特定到期日，有权按约定价格向发行人购买标的证券的有价证券。 （ ）
查看完整题目与答案
【单选题】下面对钢筋混凝土结构抗震设计提出一些要求，试问，其中何项组合中的要求全部是不正确的? ①质量和刚度明显不对称的结构，均应计算双向水平地震作用下的扭转影响，并应与考虑偶然偏心引起的地震效应叠加进行计算。 ②特别不规则的建筑，应采用时程分析的方法进行多遇地震作用下的抗震计算，并按其计算结果进行构件设计。 ③抗震等级为一、二级的框架结构，其纵向受力钢筋采用普通钢筋时，钢筋的屈服强度实测值与强度标准值的比...
A.
①②
B.
①③④
C.
②③④
D.
③④
查看完整题目与答案