葡萄膜的特点不包括()

A．虹膜可调节进入眼内的光线量，类似“快门”

B．脉络膜可起“暗房”的作用

C．睫状体起维持眼压和调节屈光度的作用

D．睫状突色素上皮细胞产生房水

E．睫状肌为平滑肌

The shipment was delayed because you had failed ______ the necessary space.

A. to order
B. to place
C. to take
D. to book