Displacement is the first and foremost striking feature of human language. ()
Displacement is the first and foremost striking feature of human language. ()
A variable displacement system of hydraulic drives consists of _____.
A.a variable displacement axial piston pump
B.a constant displacement axial piston pump
C.a reciprocating piston pump
D.a centrifugal pump
A、A .loaded displacement minus light displacement
B、B. cross tonnage minus net tonnage
C、C. loaded displacement minus net tonnage
D、D. light displacement minus the weight of the vessel
Which of the listed pumps is NOT a positive displacement pump?
A.Centrifugal
B.Reciprocating
C.Gear
D.Rotary
Why does the professor mention the wood thrush?
A.To contrast its displacement activities with those of other animal species
B.To explain that some animals display displacement activities other than grooming
C.To point out how displacement activities are influenced by the environment
D.To give an example of an animal that does not display displacement activities
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