【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】The word 'sine qua non' in the last sentence of the 5th paragraph most probably means
A.
indispensable condition.
C.
exceptional circumstance.
【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。