• 2022-05-31 问题

    exc___ A: ede B: eed C: ed D: edl

    exc___ A: ede B: eed C: ed D: edl

  • 2022-06-19 问题

    In 1803 the United States purchased Louisiana from _____.

    In 1803 the United States purchased Louisiana from _____.

  • 2022-06-19 问题

    In 1803, President Jefferson negotiated the purchase of Louisiana from Mexico.

    In 1803, President Jefferson negotiated the purchase of Louisiana from Mexico.

  • 2022-06-07 问题

    17da69153054840.png答案是( )。 A: 987 B: 1198 C: 774 D: 1014

    17da69153054840.png答案是( )。 A: 987 B: 1198 C: 774 D: 1014

  • 2022-07-26 问题

    MATLAB中绘制系统伯德图的指令为: A: ode B: ede C: ade D: 以上都不对

    MATLAB中绘制系统伯德图的指令为: A: ode B: ede C: ade D: 以上都不对

  • 2021-04-14 问题

    A metal surface illuminated by 8.5×1014 Hz light emits electrons whose maximum energy is 0.52 eV. The same surface illuminated by 12.0×1014 Hz light emits electrons whose maximum energy is 1.97 eV. The work function of the metal is (  B )

    A metal surface illuminated by 8.5×1014 Hz light emits electrons whose maximum energy is 0.52 eV. The same surface illuminated by 12.0×1014 Hz light emits electrons whose maximum energy is 1.97 eV. The work function of the metal is (  B )

  • 2022-05-26 问题

    国际网球联合会成立于 A: 1903 B: 1803 C: 1913 D: 1923

    国际网球联合会成立于 A: 1903 B: 1803 C: 1913 D: 1923

  • 2022-06-03 问题

    霍尔效应哪一年发现的? A: 1881 B: 1879 C: 1803 D: 1831

    霍尔效应哪一年发现的? A: 1881 B: 1879 C: 1803 D: 1831

  • 2022-07-24 问题

    氦—氖激光器发出波长为633nm的激光,当激光器的输出功率为1mW时,每秒发出的光子数为 A: 2.2×1015 B: 3.2×1015 C: 2.2×1014 D: 3.2×1014

    氦—氖激光器发出波长为633nm的激光,当激光器的输出功率为1mW时,每秒发出的光子数为 A: 2.2×1015 B: 3.2×1015 C: 2.2×1014 D: 3.2×1014

  • 2022-06-17 问题

    计算机信息存储单位1MB=( )KB。 A: 1000 B: 1014 C: 2014 D: 1024

    计算机信息存储单位1MB=( )KB。 A: 1000 B: 1014 C: 2014 D: 1024

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