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某路口的机动车隔离墩的三视图如下图所示,其中正视图、侧视图都是由半圆和矩形组成,...
某路口的机动车隔离墩的三视图如下图所示,其中正视图、侧视图都是由半圆和矩形组成,根据图中标出的尺寸(单位:cm)可求得隔离墩的体积为
cm
3.
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,则tan(a
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<
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