【单选题】( )(改编)The river is over ________ meters long.
A.
two thousand, fifty-six
B.
two thousands and fifty-six
C.
two thousand and fifty-six
D.
two thousand, fifty and six
【判断题】共阳极的数码管输入信号的有效电平是高电平。
【单选题】以下选项中不属于电子支付的安全问题的是( )。
【单选题】肝硬化腹水病人大量利尿放腹水最容易诱发的疾病是
【单选题】The river is over______meters long.
A.
two thousand,fifty-six
B.
two thousand and fifty-six
C.
two thousand and fifty-six
D.
two thousand,fifty and six
【简答题】共阳极的数码管输入信号的有效电平是 低 电平。
【判断题】直流测速发电机,按励磁方式可分为永磁式和电磁式。
【单选题】以下选项中不属于电子支付的安全问题的是()。