聚合物可以增加水的()。 ["温度","矿化度","流速","粘度"]
PRS网络由以下()构成 ["A、PCU","B、SGSN","C、GGSN","D、MSC"]
矩阵式组织属于()组织结构。 ["机械式","有机式","直线式","平行式"]
聚合物驱油是()采油技术。 ["热力驱","水驱","气体混相驱","化学驱"]
GPRS空中接口的信道由以下()构成 ["A、PDTCH(分组数据业务信道)","B、PPCH(分组寻呼信道)","C、PRACH(分组随机接入信道)","D、PAGCH","E、PACCH(分组随路控制信道)"]
什么叫兴奋剂?为什么国际奥委会禁止运动员使用兴奋剂?