作用在机翼上的气动力载荷主要由下列哪类构件最后传给翼梁（）
A.翼肋
B.蒙皮
C.桁条
D.立柱
参考答案：A
I was just going to cut my rose bushes, but someone ______ it. Was it you
A. has done B. had done C. would do D. will do
老年人饮用、洗漱用的热水不能超过43℃。
