—Did you sleep well last night?

—Oh, no.           noise outside the hotel almost drove me mad.

A．Too much

B．Much too

C．Too many

D．So many

选择性地阻断Na通道的物质是（）

A.河豚毒

B.四乙胺

C.阿托品

D.简箭毒

E.维拉帕米