单项选择题A.Business men are only interested in babies.B.Baby goods make money easily.C.The changes in life-styles have a strong influence on business.D.Businesses should always be ready to meet the needs of babies.
单项选择题A.Because their hearts have nothing to worry about.B.Because their heart and blood vessel are strong enough.C.Because their muscles are greatly weakened.D.Because they have the best doctor to advise on individual exercise.