按照图画出所示图形,求该图形的面积。()
A.383.7104 B.383.1740 C.383.7140 D.383.7410
按照图画出所示图形,求剖面线区域的面积。()
A.103.0793 B.103.0379 C.103.0397 D.103.7039
按照图画出所示起重机吊钩,求尺寸A的数值。()
A.223.3903 B.223.9603 C.223.9903 D.223.9973