[填空题]
In a common test for cardiac tvkixfu - x0i/9 vd0(,3 ernhufunction (the “stress ) yzw,,b(wbxw test”), the patient walks on an inclined treadmill (Fig. 6–46). Estimate the power required from a 75-kg patient when the treadmi)bw,w,(w ybzxll is sloping at an angle of 15 $^{\circ} $ and the velocity is 3.3km/h (How does this power compare to the power rating of a light bulb?)$\approx$ W
