Issuing an ante-dated bill of lading is a fraud and will impose very high risk to the shippers and ship owners. But issuing an advanced bill of lading is a generally accepted practice in trade business because it is less risky than issuing an ante-dated bill of lading.
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According to UCP 600, shipping goods by different ships, but the ships departure on the same day and head to the same destination is NOT considered to be partial shipment.
A. 对
B. 错
质点的运动方程为r=2ti-2t∧2j(SI),则t=2s时,质点的加速度为( )。
A. 2j(SI)
B. -2j(SI)
C. 4j(SI)
D. -4j(SI)
质点沿半径为1米的圆周运动,其路程与时间关系为s=0.3t∧2,则在t=1.5s时切向加速的值为( )。
A. 0.3m.s∧-2
B. 0.6m.s∧-2
C. 0.9m.s∧-2
D. 1.2m.s∧-2
质点在半径为0.1米的圆周上运动,其角位置为θ=2+t∧3(SI),则在t=2.0s时的法向加速度为( )。
A. 8.0m·s∧-2
B. 10.0m·s∧-2
C. 12.0m·s∧-2
D. 14.4m·s∧-2