有一扇形钢板,假设角度为120°,弯曲半径为0.8m,其面积为() ["0.96m2","0.84m2","0.75m2","0.66m2"]
车辆维护可以分为()这几类维护。 ["日常","一级","二级","三级","四级"]
招标人对投标申请人进行资格审查时,应当审查投标申请人的() ["资质等级","财务状况、经营业绩","信用状况和设备等情况","技术标书科学性"]
构件吊装时,吊点的选择应使吊点(或各吊点的合力作用点)与重物的()在同一垂直线上,并且应在其上。 ["几何形心","中心","投影中心","重心"]
防抱死制动系统ABS是在紧急制动时防止车轮抱死,使车轮处于()状态。 ["放松","半抱死","滚动","半滚动","不滚动"]
受体与激素、细胞因子的结合特征是什么?