【单选题】( )是一种具感染性的、比较持久和微弱的情绪状态。
【单选题】采集的静脉血液中加入抗凝剂,混合后,2500~3000rpm离心5~10min,所得淡黄色上清液为
【单选题】Which is the most compelling reason why mobile advertising is related to big data?
A.
Mobile advertising benefits from data integration with location which requires big data.
B.
Mobile advertising allows massive cellular/mobile texting to a wide audience, thus providing large amounts of data.
C.
Mobile advertising in and of itself is always associated with big data.
D.
Since almost everyone owns a cell/mobile phone, the mobile advertising market is large and thus requires big data to contain all the information.
【单选题】采集的静脉血液中加入抗凝剂,混合后,2500~3000rpm离心5~10min,所得淡黄色上清液为( )。
【简答题】用列举法表示下列集合: (1)方程x2-7x+12=0的根的集合 (2)抛物线y=x2与直线x—y=0交点的集合 (3)集合{x ||x-1 |≤5的整数}
【单选题】用列举法表示抛物线 直线 交点的集合( )
【简答题】用列举法表示下列集合: (1) 方程 的根的集合; (2) 抛物线 与直线 的交点的集合 .
【单选题】()是一种具有感染性的、比较持久和微弱的情绪状态。