题目

 They really had a great time, designing everything, drawing the blueprint, ______the angles and so on. A  looking out    B  taking out       C  finding out   D  figuring out 答案：D满足下列条件的△ABC，不是直角三角形的是（　　） A、b2=a2-c2B、∠C=∠A-∠BC、∠A：∠B：∠C=3：4：5D、a：b：c=12：13：5