Britain has recently had a high level of unemployment—but the same is true ________ many other countries.

A．at

B．from

C．of

D．to

小脑幕切迹疝形成后病情恶化的主要原因是

A．枕叶皮层的梗死

B．动眼神经麻痹

C．脑脊液循环通路受阻

D．颞叶钩回受压出血坏死

E．急性脑水肿