試題詳解

28. Pooling results from three observational studies involving 187,453 men andwomen followed for more than 25 years, researchers found that compared to  ating potatoes only once a month, having one potato — baked or boiled —  four to six times a week increases the risk of hypertension for 11 percent.
(A)results from 
(B)followed
(C)baked or boiled
(D)for
(E)No Error.