Abstract: Provided are a composition, kit, and application for the detection of colorectal cancer. The provided composition contains reagents for detecting methylation status of ADHFE1 gene, PPP2R5C gene, and SDC2 gene. The composition can be used for detecting colorectal cancer with high sensitivity and specificity.

Abstract: The present disclosure providing a geological sampling backpack drilling machine includes a housing, a drilling device movably received in the housing, a seat arranged on the housing, and a bracket detachably connected to the housing via a limiting rotator, with an angle between the bracket and the housing being variable; the seat arranged between a tip of a drilling rod and the bracket, and rotating around the drilling rod as an axis thereof; a rotating member arranged on a surface of the seat and surrounding around the drilling rod to detachably connect with a supporting post, both the supporting post and the bracket cooperatively supporting the drilling device; the drilling rod passing through the housing and the seat; both the bracket and the supporting post supporting the drilling device that is obliquely drilled and the housing for enabling the drilling device to stably drill at an inclined state.