A high quality speech is reproduced with a small data amount in speech coding and decoding for performing compression coding and decoding of a speech signal to a digital signal. The present invention discloses functional domains of E1A responsible for the suppression of transformation, and provides mini-E1A constructs that can be used for tumor suppression. The cooled, dehydrated synthesis gas is then returned to the compressor and introduced into the second stage thereof. The metallic material 13 on the surface of the particles is preferably present throughout the thickness of the active material layer. The present invention will achieve dynamic sharing of Abis transmission resources on a RTS layer so as to optimize using of Abis transmission resources, reduce waste and decrease operating cost.