Under the expedite system, the server must win the point before the opponent makes _____ consecutive returns in a rally; otherwise the point goes to the opponent. ( )
A.12
B.13
C.15
D.18
正确答案：13
Under the expedite system, the server must win the point before the opponent makes _____ consecutive returns in a rally; otherwi
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A let is awarded when the ball doesn’t touch the net in service. ( )
According to the international rule, the table tennis game is played with a sphere having a mass of 2.7 g and a diammiter of ___
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