逻辑的辑是二声还是轻声或四声?如果两个二声在一起第二个是否变声?变成什么?

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• 逻辑的辑是二声还是轻声或四声?如果两个二声在一起第二个是否变声?变成什么?
• 逻辑的辑是二声还是轻声或四声?如果两个二声在一起第二个是否变声?变成什么?
• 在极坐标系中，若过点（1，0）且与极轴垂直的直线交曲线ρ=4cosθ于A、B两点，则|AB|= ___ ．
• 1.The forests of the tropics produce a magnificent growth of trees,but commercial lumbering is inhibited by problems that increase the cost of removal.The proliferation of species that is common to all tropical forests creates difficulties because many species are worthless.The lumberman combs the forest,therefore,removing the valuable trees that are convenient to waterways,and floating them downstream to a sawmill.Unfortunately,tropical hardwoods ten