【单选题】Technician A says that the small gap between the piston and the cylinder wall is known as the compression ratio. Technician B says that the gap is known as piston clearance. Who is correct?
【简答题】Technician A says that the small gap between the piston and the cylinder wall is known as the compression ratio. Technician B says that the gap is known as piston clearance. Who is correct?A. Technici...
【单选题】As the backbone of the North American continent, ______is known as the Continental Divide and separates the major river system of the United States.