生活中出现了问题，怎样避免冲突？
参考答案：
先缓冲下来，留出一个空间，用时间换空间。内心冷静，观察变化，用智慧来处理。
My father _______ to Shanghai. He _______ for over 2 months. [ ]
A. has been, has left
B. has gone, has gone
C. has gone, has been away
D. has been, has gone
当屋面坡度大于15％时，卷材长边铺贴方向为
A．垂直屋脊
B．平行屋脊
C．倾斜屋脊
D．任意方向
