A display panel includes a first substrate and a second substrate facing the first substrate. The invention further relates to vectors including a housekeeping epitope expression cassette and also vectors including epitope cluster regions. In the embodiments of the present invention, a base station may select a candidate component carrier for the UE according to obtained component carrier support information and perform resource configuration, so that the UE can accurately know to which component carrier a resource parameter is applied, and thus a data transmission error may be reduced. A one-piece nozzle is made from a tubular member having a substantially constant cross-section extending along the length of the member. It also relates to a method of producing a polymer dispersion and to a paper-making process.