矩阵(1,2,3,0;5,6,0,8;9,0,11,12;0,14,15,16)的行列式值为: A: -5464 B: 5464 C: 7684 D: 4893

以下哪段代码能把数值516以二进制的形式写入My文件中。 A: BinaryWriter bw = new BinaryWriter(File.Open("My", FileMode.Create));bw.Save(516); B: BinaryWriter bw = new BinaryWriter(File.Open("My", FileMode.Create));bw.write(516); C: BinaryWriter bw = new BinaryWriter(File.Open("My", FileMode.Create));bw.Write(516); D: BinaryWriter bw = new BinaryWriter(File.Open("My", FileMode.Create));bw.save(516);

In 1803 the United States purchased Louisiana from _____.

以下哪段代码能把数值516以二进制的形式写入My文件中。 A: BinaryWriter bw = new BinaryWriter(File.Open("My", FileMode.Create));bw.Save(516); B: BinaryWriter bw = new BinaryWriter(File.Open("My", FileMode.Create));bw.write(516); C: BinaryWriter bw = new BinaryWriter(File.Open("My", FileMode.Create));bw.Write(516); D: BinaryWriter bw = new BinaryWriter(File.Open("My", FileMode.Create));bw.save(516);

PNG图片可以以几位储存图像数据？（） A: 8 B: 16 C: 10 D: 24

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

2，1，9，30，117，（）。 A: 516 B: 441 C: 217 D: 174

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

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

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