A.40V
B.20V
C.15V
[单选题]A.50.5B.50.8C.51.8D.52.2E.52.6
[单选题]A.50.5B.50.8C.51.8D.52.2E.52.6
[单选题]A.144平方米B.148平方米C.156平方米D.164平方米
[单选题]A.144平方米B.148平方米C.156平方米D.164平方米
[单选题]A.加、减、除B.除、加、加C.加、加、减D.减、减、加
[单选题]A.57107.5B.57415.2C.56981.95D.11289.9
[单选题]A.0.5倍B.2倍C.4倍D.8倍