Dr Jones ordered ____ for the laboratory.A.two equipments B.two pieces of equipments C.two pieces of equipment D.two equipment pieces

Dr Jones ordered ____ for the laboratory.A.two equipments B.two pieces of equipments C.two pieces of equipment D.two equipment pieces
Dr Jones ordered ____ for the laboratory.
A.two equipments B.two pieces of equipments
C.two pieces of equipment D.two equipment pieces

Dr Jones ordered ____ for the laboratory.A.two equipments B.two pieces of equipments C.two pieces of equipment D.two equipment pieces
选C
equipment 是设备器材的统称,加S就表示两类设备了,这里要表达的是两个设备,不是两类

B
两者都需要复数

c.
equipment 当名词讲时，不可数