【单选题】The science of horticulture ______ the primary concerns are maximum yield and superior quality, utilizes information derived from other sciences.
【判断题】电路的作用是实现电流的传输和转换、信号的传递和处理。
【判断题】电路的作用是实现电流的传输和转换、信号的传递和处理。
【单选题】Which figure can describe the attribute of the entity in the E-R graph? ( )
【判断题】电路的作用是实现电能的 传输和转换、信号的传输、处理和存贮。