如图5-4-9所示，截面对z轴和y轴的惯性矩和惯性积为（　　）。图5-4-9

A、<img width="195" height="38" src="http://admintk.100xuexi.com/UpLoadImage/2013-05-07/940da39f-b96f-4390-891d-74b6a7b4f331.png" />

B、<img width="168" height="36" src="http://admintk.100xuexi.com/UpLoadImage/2013-05-07/be6367c4-ab9d-49ca-9bf3-e9672e342a82.png" />

C、<img width="170" height="37" src="http://admintk.100xuexi.com/UpLoadImage/2013-05-07/838b394a-847b-498e-ae3b-5981f8598b4e.png" />

D、<img width="254" height="39" src="http://admintk.100xuexi.com/UpLoadImage/2013-05-07/09a0df9d-63cf-45b0-beb8-bcfe1dedfc07.png" />