The kid is crying, for he ______ jump over the ditch on his own.

A．dares not to

B．dare not to

C．doesn’t dare to

D．dares not

下列说法正确的是：

A．睫状突环绕一周约有70多条．

B．睫状体横切面呈一尖端向前，底端向后的三角形．

C．房水产生于睫状突表面的上皮细胞．

D．睫状肌最外层为环形纤维．

E．睫状肌中间层为放射形纤维．