Speaker A: The native American Craft Exhibit closed this afternoon.Speaker B: ______

A．Oh, no! I've wanted to see that for months.

B．Well, why didn't you take me to see the exhibit before it closed

C．Thank you. When will there be such an exhibit again

D．If I were you, I would have gone to see it.

某人的头部遭到重击，引起心跳、呼吸停止，危及生命。这主要是由于损伤了[ ]

A．颈部脊髓和脊神经

B．脑干的基本生命活动中枢

C．大脑

D．小脑