未知题型 既能提高运动能力又可减肥的营养补剂有( )。

多项选择题 人体内的能源和结构物质是（）。

单项选择题 根据下列材料请回答 51～65 题：Breastfeeding Can Cut Cardiovascular(心血管的)RiskBreastfeeding Can reduce the risk of a heart a attack or stroke later in life and could prevent hundreds of_________ (51)of deaths each year，researchers said on Friday.Babies who are breastfed have fewer childhood infections and allergies(过敏)and are less _________(52)to obesity(肥胖).British scientists have now shown that breastfeeding and slow growth in the first weeks and months of life has a protective effect _________ (53) cardiovascular disease.“Diets that promote more rapid growth put babies at risk many years later in_________ (54)of raising their blood pressure，raising their cholesterol(胆固醇)and increasing their tendency to diabetes(糖尿病)and obesity—the_________ (55)main risk factors for stroke and heart attack，”said Professor Alan Lucas of the Institute of Child Health in London.“Our evidence suggests that the reason why breast-fed babies do better is because they grow more_________ (56)in the early weeks.”Lucas said the effects of breastfeeding on blood pressure and cholesterol later in life are greater than_________ (57)adults can do to control the risk factors for cardiovascular disease，other than taking drugs.An estimated 1 7 million people die of_________ (58)disease，particularly heart attack and strokes，each year，according to the World Health Organization Lucas and his colleagues compared the health of 216 teenagers_________ (59)as babies had either been breastfed or given different nutritional baby formulas.They reported their_________ (60)in The Lancet medical journal.The teenagers who had been_________ (61)had a 14--percent lower ratio of bad to good cholesterol and lower concentrations of a protein that is a marker for cardiovascular disease risk.The researchers also found that，_________ (62)of the child's right at birth，the faster the infants grew in the early weeks and months of life，the_________ (63)was their later risk of heart disease and stroke，The effect was the_________ (64)for both boys and girls;“The more human milk you have in the newborn period.the lower your cholesterol level is，the lower your blood pressure is 16 years _________ (65)，”Lucas said. 第 51 题A．thousands B．hundreds C．millions D．numbers