It is good news to us that we are invited to such a great concert, _____?

[      ]

A. is it

B. isn't it

C. are we

D. aren't we

Guillian-Barre(格林-巴利)综合征时最早的电诊断所见是()

A．F波变慢或无

B．运动远端潜伏期延长

C．肘部尺神经局部传导阻断

D．腓骨头处腓神经近端局部传导阻断

E．腓肠肌潜伏期延长