题目

Studies have shown that the fewer medicines a person has to take the more likely he or she will take them. Last week, a study was released about a new treatment that combines 5 medicines for heart disease in one pill. Salim Yusuf of McMaster University in Hamilton, Ontario, Canada was the lead investigator. He presented the findings at the American College of Cardiology Conference in Orlando, Florida. The experimental drug is known as Polycap. It contains aspirin, a drug to lower cholesterol（胆固醇） and three medicines to lower blood pressure. The study was carried out at 50 health对方程x2-2x-13=1去分母正确的是（　　）A．3x-2（2x-1）=6B．3x-2（2x-1）=1C．3x-4x-1=6D．x-（2x-1）=1