申論 1試述下列名詞之意涵(可繪圖輔助說明):(每小題5 分,共25 分)㈠集水井與橫向排水管(Water collecting well and Horizontal drain)㈡傾斜觀測管與孔內傾斜儀(Inclinometer casing and Inclinometer probe)㈢差異侵蝕與落石(Differential erosion and Rock fall)㈣直剪試驗與弱面直剪試驗(Direct shear test and Direct shear test of weak plane)㈤有效應力分析與總應力分析(Effective stress approach and Total stress approach)