6. Certain foods are common causes of ________. For example, dairy products contain sugar lactose, which
causes gastrointestinal gas.
(A) flatulence
(B) hemorrhage
(C) vertigo
(D) cramp
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統計: A(312), B(45), C(25), D(35), E(0) #2363045
統計: A(312), B(45), C(25), D(35), E(0) #2363045