試題詳解

47. According to the passage, which of the following is NOT a scientific fact?
(A)The more a person sits, the less effective it is to regulate blood glucose level.
(B)With two extra hours of sitting, the risk of heart attacks can be increased by a quarter.
(C)One of the risk factors for diabetes is extended sitting.
(D)Standing all day could increase physical discomfort and lower work efficiency.