β受体阻断药可以引起（）

A.心率加快，心排血量增加

B.支气管痉挛，诱发哮喘发作

C.脂肪分解加速

D.肾素分泌增加

E.眼压升高

. When the policeman stopped us, we all looked questioningly at him,       ?

A．nervously and puzzled

B．nervous and puzzling

C．nervous and puzzled

D．nervously and puzzling