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【单选题】
局部视图的断裂边界( )表示。A.
波浪线
B.
虚线
C.
点画线
D.
细实线
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举一反三
【单选题】If he __ his legs yesterday, he __ with us now.
A.
hadn’t hurt ; would go
B.
hadn’t hurt; would have gone
C.
didn’t hurt; would go
D.
didn’t hurt; would have gone
【简答题】Does the traffic light system have duality?
【简答题】He was caugh t cheating in the
examination. If he had a tail , he would put it between his legs.
【单选题】If David his legs in the last training, he would join in the coming World Cup, which he has been longing to compete in.
A.
didn’t hurt
B.
hadn’t been hurt
C.
wasn’t hurt
D.
hadn’t hurt
【简答题】Does the traffic light system have duality? Can you explain by drawing a graph?
【简答题】Does traffic light system have duality? Why or why not?
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