【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 ( ). ( )
【单选题】“Please remain seated and fasten your seatbelts.”的中文意思是()。
【单选题】Please remain seated until the plane_____to complete landing.
【判断题】平面一般力系平衡的条件是主矢和主矩均为零。()
【单选题】Please remain seated while waiting for ____________ at Airport. Thank you for your cooperation.
【判断题】埋地式生活饮用水贮水池周围8m范围内有污染源,应采取防污染的措施。