【判断题】对于轴线未居中的梁,应标注其偏心定位尺寸。贴柱边的梁也要注写。
【单选题】Please remain seated and keep your seat belts ( ). ( )
【判断题】For your safety, please remain seated with your seatbelt fastened, leaving all items of hand luggage safely stowed, until the seatbelt sign have been switched off.
【单选题】“Please remain seated and fasten your seatbelts.”的中文意思是()。
【判断题】平面一般力系平衡的条件是主矢和主矩均为零。()
【简答题】平面一般力系平衡的条件是主矢和主矩()。
【单选题】Please remain seated while waiting for ____________ at Airport. Thank you for your cooperation.