One variable displacement electric motor driven pump supplies fluid to using systems upon demand. in the above sentence, " variable displacement", "upon demand" means "可变容量,可调排出量" 和 "根据需要".
A.1
正确答案是A
One variable displacement electric motor driven pump supplies fluid to using systems upon demand. in the above sentence, " variable displacement", "upon demand" means "可变容量,可调排出量" 和 "根据需要".
A.1
正确答案是A