【单选题】Windows 7 提供的待机模式中,在______模式下,系统的状态是保存在内存中的。
【判断题】每年公历4月中旬是满族的新年,泼水节活动一般持续三到四天,其中第四天是满族新年的开端之日。
【单选题】Which of the following best explains the competition between digital wallet and payment card?
A.
Most commerce still involves cash and cheques, so payment cards are hard to remove.
B.
Phone-based payments systems such as M-pesa will spread throughout the world.
C.
The joint ventures combined the innovative firms with card firms will occupy the market all over the world.
D.
Though mobile payment will cover all over the world, the card firms are not easy to give up the market.
【单选题】. --- What else do you want to know about the cell phone? --- _______ it can be used as a digital camera. You know, I’m into photography.
【简答题】在没有泄露的情况下,根据泵的几何尺寸计算得到的流量称为( );泵在规定转速和额定压力下输出的流量称为( );泵在某工作压力下实际输出的流量称为( )。
【单选题】液压泵单位时间内排出油液的体积称为泵的流量。在没有泄露的情况下, 根据泵的几何尺寸计算而得到的输出流量,它等于排量和转速的乘积,称为( )