THE TERM "TOOTH DECAY" REFERS TO THE_________A. DIGESTION...

1536) - DE THI TNTHPT 1536) - DE THI TNTHPT
DE THI TNTHPT
1536)The term "tooth decay" refers to the_________A. digestion of the food B. conversation of the sugarC. Production of the acid D. dissolution of the enamelTable tennisPeople first played table tennis (41)_______ the 19th century. It really started as achildren's game, which was played (42)_______ home. But now it (43)_______ an adult sport,and there are many international competitions. Sometimes more (44)_______ 10,000 peoplewatch an important table tennis game.A table tennis table is 2.7 meters long and 1.5 meters wide and there is a net(45)_______ the middle. Players hit a light plastic ball over (46)_______ net with a smallwooden bat.Many people (47)_______ that table tennis is an easy sport, but (48)_______ isn't true.Players have to (49)_______ very fast because the ball can (50)_______ at over 100kilometers au hour!