There is provided a washing liquid composition for a semiconductor substrate having a contact angle between the surface thereof and water dropped thereon of at least 70 degrees, the washing liquid composition including an aliphatic polycarboxylic acid and a surfactant, and the washing liquid composition having a contact angle of at most 50 degrees when dropped on the semiconductor substrate. The method includes a process of building at least one or more knowledge model for each of the plurality of services in the integrated support platform. A second breakaway frame or arm is attachable to and detachable from the first frame, and extends beyond the conventional stop sign. In response, the authentication server authenticates the individual UserID with the corresponding individual password and returns to the workstation the group password for the GroupID. A sound source for the musical signal can also be provided as part of the waterproof recreational audio device. Various catalyst preparation methods are disclosed including autoignition and gel-sol methods.