【单选题】
Diet is second only to tobacco as a leading{{U}} (51) {{/U}}of cancer and, along with alcohol, is responsible for nearly one third of cases of the disease{{U}} (52) {{/U}}developed countries, a leading researcher said on Tuesday.
Dr. Tim Kev, of the University of Oxford, told a cancer conference that scientists are still discovering how certain foods contribute to{{U}} (53) {{/U}}, but they know that diet, alcohol and obesity (肥胖){{U}} (54) {{/U}}a major role.
"Five percent of cancers could be avoided{{U}} (55) {{/U}}nobody was obese(肥胖的)," he saiD、While tobacco is linked to about 30{{U}} (56) {{/U}}of cancer cases, diet is involved in all estimated 25 percent and alcohol{{U}} (57) {{/U}}about six percent.
Obesity raises the{{U}} (58) {{/U}}of breast(乳腺), womb(子宫), bowel and kidney cancer, while alcohol is known to cause cancers of the mouth, throat and liver. Its dangerous impact is{{U}} (59) {{/U}}when combined with smoking.
Kev told the meeting of the charityCancer Research UK{{U}} (60) {{/U}}other elements of diet linked to cancer are{{U}} (61) {{/U}}unknown but scientists are hoping that theEPIC、study, which is comparing the diets of 500,000 people in 10 countries and their risk of cancer, will provide some{{U}} (62) {{/U}}.
Early results of the study have revealed that Norway, Sweden andDenmark have the{{U}} (63) {{/U}}consumption of fruit and vegetables amongEuropean countries while Italy and Spain have the highest.Eating at{{U}} (64) {{/U}}five portions of fruit and vegetables a day is recommended to reduce the risk of cancer.
Key, principal scientist on theEPIC、study, said it is looking at dietary links to some of the most common cancers{{U}} (65) {{/U}}colorectal, breast and prostate.
B．countries
C．people
D．number
网考网参考答案：A
网考网解析：
[解析] 该句用到了三处百分比，分别提到烟草、饮食和酒精与癌症的关系，表示百分之多少用 percent，故选A。 document.getElementById("warp").style.display="none"; document.getElementById("content").style.display="block"; 查看试题解析出处>>
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