我国设计速度300km/h的高速铁路，区间最小线间距是（   ）。 A.
5.0米 B.
4.8米 C.
4.6米 D.
4.4米

A．the patient feels soreness,distention,heaviness and numbness
B．the practitioner feels tenseness around the neddle
C．the practitioner feels the needle trembling
D．the practitioner feels empty and smooth under the needle

A．100
B．80
C．91
D．9