在KCB表中找出名字中包含“原理”两个字的课程，对应的SQL命令是（）。 A:  SELECT * FROM KCB WHERE 课程名 =  ’原理’ B:  SELECT * FROM KCB WHERE课程名LIKE  ’%原理’ C:  SELECT * FROM KCB WHERE课程名LIKE  ’原理%’ D:  SELECT * FROM KCB WHERE课程名LIKE  ’%原理%’

下面不是数码打样软件的是（） A: GMG B: Excel C: BestScreenProof D: BlackMagic

用孔径分别为 [tex=23.786x1.286]z4GiupUzfPDgj0aT6RVfrH3TICFHVFwpO8SHOLcC3uRbCRs+rupaj1LEDC3mnRyLcs7a6OAdHNdZEMHqyuoNgR4jJsArBQ91NA0hXKGgxkM=[/tex][tex=29.643x1.286]caRiD4Yh4YxvYRoZ5zKQneBpnDIjrUM99wDqvaKelZlmE+Mfag5D+EoAwZQ6K97fFcgmhPFCvxmkdmi/iAVI+SZdR4OIi8PfEj3H30TqW6mvf9TBLE9sCyOmsbd8QeP4FFpFhcRyq/KcB1GmG1Cbag==[/tex][tex=13.786x1.286]KBPkuRjVz4B7bKXEVAOKpnOC3ihxQ15HM0u90Ukh7GlVueHeCIIUdm7rGcJvctdV[/tex]

用孔径分别为 [tex=23.786x1.286]z4GiupUzfPDgj0aT6RVfrH3TICFHVFwpO8SHOLcC3uRbCRs+rupaj1LEDC3mnRyLcs7a6OAdHNdZEMHqyuoNgR4jJsArBQ91NA0hXKGgxkM=[/tex][tex=29.643x1.286]caRiD4Yh4YxvYRoZ5zKQneBpnDIjrUM99wDqvaKelZlmE+Mfag5D+EoAwZQ6K97fFcgmhPFCvxmkdmi/iAVI+SZdR4OIi8PfEj3H30TqW6mvf9TBLE9sCyOmsbd8QeP4FFpFhcRyq/KcB1GmG1Cbag==[/tex][tex=13.786x1.286]KBPkuRjVz4B7bKXEVAOKpnOC3ihxQ15HM0u90Ukh7GlVueHeCIIUdm7rGcJvctdV[/tex]

北京人民电器厂有限公司交流微型隔离开关的型号是（）。 A: GNT-100 B: G100 C: GMG D: GM5-63PG

for i in range(b.max_row): for j in range(b.max_column): print(b.cell(row=i,column=j).value)上面语句运行的结果是：__________。 A: 1 1 1 1 1 1 1 1 1 1 B: 1111111111 C: 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 D: 出现异常

【单选题】CDMA通信的基站,假定基站A的码片序列是+1 +1 +1 -1 -1 +1 -1 -1,基站发射bit为101时,实际发射的信号是 A. +1 +1 +1 -1 -1 +1 -1 -1 +1 +1 +1 -1 -1 +1 -1 -1 –1 –1 –1 +1 +1 –1 +1 +1 B. +1 +1 +1 -1 -1 +1 -1 -1 –1 –1 –1 +1 +1 –1 +1 +1 +1 +1 +1 -1 -1 +1 -1 -1 C. +1 +1 +1 -1 -1 +1 -1 -1 +1 +1 +1 -1 -1 +1 -1 -1 +1 +1 +1 -1 -1 +1 -1 -1 D. –1 –1 –1 +1 +1 –1 +1 +1 –1 –1 –1 +1 +1 –1 +1 +1 –1 –1 –1 +1 +1 –1 +1 +1

for i in range(1,11): for j in range(1,11): b.cell(row=i,column=j).value=1 #b是一个工作表对象for i in range(1,11): for j in range(1,11): print(b.cell(row=i,column=j).value,end=" ") print()上面程序代码运行的结果是（）。 A: 1 B: 1 1 1 1 1 1 1 1 1 1 C: 1111111111 D: 1 1 1 1 1 1 1 1 1 11 1 1 1 1 1 1 1 1 11 1 1 1 1 1 1 1 1 11 1 1 1 1 1 1 1 1 11 1 1 1 1 1 1 1 1 11 1 1 1 1 1 1 1 1 11 1 1 1 1 1 1 1 1 11 1 1 1 1 1 1 1 1 11 1 1 1 1 1 1 1 1 11 1 1 1 1 1 1 1 1 1

下列哪个码片序列不能用于CDMA通信 A: ( -1 -1 -1 +1 +1 -1 +1 +1 ) B: ( -1 -1 +1 -1 +1 +1 +1 -1 ) C: ( -1 +1 -1 +1 +1 -1 -1 -1 ) D: ( -1 +1 -1 -1 -1 -1 +1 -1 )

请仔细观察下面行列式的计算过程，如果四个等号都理解了，请选择A，否则请选择B。 | a 1 1 1 1 | |a＋4 a＋4 a＋4 a＋4 a＋4| | 1 a 1 1 1 | | 1 a 1 1 1 | | 1 1 a 1 1 |= | 1 1 a 1 1 | | 1 1 1 a 1 | | 1 1 1 a 1 | | 1 1 1 1 a | | 1 1 1 1 a | | 1 1 1 1 1 | | 1 a 1 1 1 | =(a＋4) | 1 1 a 1 1 | | 1 1 1 a 1 | | 1 1 1 1 a | | 1 1 1 1 1 | | 0 a–1 0 0 0 | =(a＋4) | 0 0 a–1 0 0 | | 0 0 0 a–1 0 | | 0 0 0 0 a–1 | =(a＋4)(a–1)^4