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【单选题】
In the velocity parallelogram drawn based on the theorem of composition of velocities,A.
the absolute velocity is diagonal of the parallelogram formed by the transport velocity and relative velocity.
B.
the transport velocity is diagonal of the parallelogram formed by the absolute velocity and relative velocity.
C.
the relative velocity is diagonal of the parallelogram formed by the transport velocity and absolute velocity.
D.
the algebraic sum of the projections of the absolute velocity, transport velocity and relative velocity on any axis is equal to zero.
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举一反三
【单选题】If you want to find something to do just for Saturday afternoon, which telephone number will you call?
A.
88545731
B.
64301398
C.
65072421
D.
65071818
【简答题】下列词语中,字形正确无误的一组是( )