It is ________ of a bride to throw the flowers in her hand to the wedding guests.

A．fortunate

B．typical

C．ordinary

D．generous

有一游标卡尺，主尺的最小分度是 1mm，游标上有 20个小的等分刻度。用它测量一工件的长度，如图所示。图示的读数是_____________mm。