以下有关人体内血液流动方向的表述中，正确的是[ ]

A．右心室→右心房→主动脉

B．入球小动脉→膀胱→出球小动脉

C．肺静脉→左心房→左心室

D．左心室→右心室→肺动脉

SD Memory Cards are versatile, high-capacity storage cards that are extremely small-about the size of a postage stamp.

A．adaptable

B．adoptable

C．variable

D．veritable