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【判断题】
周口店猿人遗址是迄今世界上人类遗址中代表性最全面、发掘历史最长久、资料最丰富和完整的一个遗址。( )A.
正确
B.
错误
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【简答题】A．The sun is in the same direction. B．They can see the compass. C．They have made the sign on the way. D．They have the instinct to tell the direction.
【单选题】Ever since human beings have ______ the earth, they have made use of various kinds of tools.
A.
dwelt
B.
inhabited
C.
lingered
D.
perched
【简答题】For as long as humans have lived on the earth, they have made use of various forms of communication. Generally, this expression of thoughts and feelings has been in the form of oral speech. When there...
【简答题】目前汽车上所用的摩擦制动器可分为 和 两种,前者以 作为旋转部件,后者的旋转部件是 。
【简答题】曳引轮、盘车手轮和限速器轮等旋转部件的外侧面应涂成( )色,手动释放制动器的操作部件应涂成( )色。
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