题目

—Which driver was to blame? — Why, ______! It was the child's fault, clear and simple. He suddenly came out between two parked cars. A . both B . each C . either D . neither 答案：D16．侧面都是直角三角形的正三棱锥，底面边长为a时，该三棱锥的全面积是（　　）A．$\frac{3+\sqrt{3}}{4}$a2B．$\frac{3}{4}$a2C．$\frac{3+\sqrt{3}}{2}$a2D．$\frac{6+\sqrt{3}}{4}$a2