A.質(zhì)量較小的槳葉 B.質(zhì)量較大的槳葉 C.每個(gè)槳葉 D.質(zhì)量較小和較大的槳葉
A.256mm B.2560mm C.252mm D.1780mm
A.Ⅰ+Ⅱ B.Ⅰ+Ⅲ+Ⅳ+Ⅴ C.Ⅲ+Ⅳ+Ⅴ D.Ⅰ+Ⅱ+Ⅲ+Ⅳ