Isolated cases of disaffection—or harbingers of a mass cross-border movement that threatens Europe's economic stability The question is pressing.

A．sign

B．forerunner

C．messenger

D．vanguard

甲状腺功能亢进症危象的主要临床表现（）

A.心率加快、血压高、头晕、头痛

B.心率>160次／min、体温>39℃、腹泻

C.心悸、气促、呕吐、腹泻

D.发绀、鼻翼扇动、心悸、出汗

E.面色苍白、四肢厥冷、呼吸困难