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单选题Very few of our birds stay with us the year round.Some come to us in the winter from the cold north.Others come from the south to spend the summer with us.How do they know the way Suppose you were tol
单选题20世纪90年代初,帝国主义在非洲的殖民体系最终崩溃。与拉丁美洲相比,第二次世界大战后非洲的民族独立运动的不同之处是( )。
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单选题下列反应发生后,溶液中阳离子浓度会明显增加的是( )。
单选题隋朝时,我国建筑水平显著提高,著名建筑师宇文恺的主要历史贡献是主持营建( )
单选题Very few of our birds stay with us the year round.Some come to us in the winter from the cold north.Others come from the south to spend the summer with us.How do they know the way Suppose you were tol
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单选题请选出下面划线部分读音不同的选项
单选题《马关条约》中,规定列强可以对中国资本输出的条款是( )。
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单选题天安门广场位于北京市中轴线上,北侧是天安门。图6是2018年3月27日一位小朋友向在天安门广场执勤的武警战士敬礼的照片。该日已过二十四节气中的( )。
单选题It was said that the new car__________to the institute as a gift by a businessman.
单选题The keyboard of a typewriter refers to the set of keys in it.Most typewriters haveqwertykey-boards.The name crones from the first six letters on the board′s second line.Theqwertyboard was set up by C.
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单选题西周时,“一人跖(踏)耒而耕,不过十亩”;战国时,“一夫挟五口,治田百亩,岁收亩一石半,为粟百五十石”。产生这一变化的原因是( )。
单选题已知抛物线y2=6x的焦点为F,点A(0,-1),则直线AF的斜率为( )