%E6%95%99%E8%82%B2%E6%B4%BB%E5%8A%A8%E7%9A%84%E6%A0%B9%E6%9C%AC%E7%9B%AE%E7%9A%84%E5%B0%B1%E6%98%AF%E4%B8%BA%E4%BA%86%E5%AE%9E%E7%8E%B0

1-1+%E7%9F%A5%E8%AF%86%E4%BA%A7%E6%9D%83%E7%9A%84%E6%A6%82%E5%BF%B5.mp4 A: 1 B: 2 C: a

在基于RS-485的MODBUS通信中,网关节点发送的报文是:02 02 00 00 00 01 B9 F9,则响应报文正确的是( )。 A: 02 02 01 01 60 0C B: 02 02 02 01 60 0C C: 02 02 01 00 01 60 0C D: 02 02 02 00 60 0C

查询图书编号是"01"或"02"的记录,可以在条件中输入（ ）。 A: "01" and "02" B: not in ("01" , "02") C: in ("01" , "02") D: not ("01" and "02")

In 1803 the United States purchased Louisiana from _____.

'2020/02/29'.split('/')的运行结果是： A: '2020' '02' '29' B: 2020 02 29 C: [2020,02,29] D: ['2020','02','29']

设A为m×n矩阵，B为n×m矩阵，且m＞n，则必有() A: |AB|=0 B: |BA|=0 C: |AB|=|BA| D: ||BA|BA|=|BA||BA|

[img src="http://edu-image.nosdn.127.net/D69ABD68260993CC215898EB74B1E2A2.bmp?imageView%E4%B8%8A%E5%9B%BE%E8%9E%BA%E7%BA%B9%E9%83%A8%E5%88%86%E7%9A%84%E8%A1%A8%E8%BE%BE%E9%94%99%E8%AF%AF%E7%9A%84%E5%9C%B0%E6%96%B9%E4%B8%BA%EF%BC%88%20%EF%BC%89"] A: 大径、小径的线宽 B: 螺纹终止线的线型 C: 剖面线的线宽 D: 剖面线的填充区域不完整

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