1.A为n阶矩阵,且A^2-2A-E=0,求（A+3E)^-1
1.A为n阶矩阵,且A^2-2A-E=0,求（A+3E)^-1
1.A=｛X/-1＜X＜2｝B=｛X/X＞a｝若A包含于B求a范围
1.A=｛X/-1＜X＜2｝B=｛X/X＞a｝若A包含于B求a范围
1.a²b除以a²=（?）
1.a²b除以a²=（?）
1.A feather is ________________(light) a stone.
1.A feather is ________________(light) a stone.
sf_(1.A、ee;B、ss;C、33;D、oo)das_(1.A、ee;B、ss;C、33;D、oo)fs_(1.A、ee;B、ss;C、33;D、oo)d
sf_(1.A、ee;B、ss;C、33;D、oo)das_(1.A、ee;B、ss;C、33;D、oo)fs_(1.A、ee;B、ss;C、33;D、oo)d
1.A: What is top of the agenda for the meeting? B: ______________________________.
1.A: What is top of the agenda for the meeting? B: ______________________________.
1.A job application letter, also known as a________.
1.A job application letter, also known as a________.
1.A successful PowerPoint Presentation is supposed to be well designed with many pictures.
1.A successful PowerPoint Presentation is supposed to be well designed with many pictures.
根据式子求a表示什么数?1.a＜-a2./a/=a3./a/=-a4./a/＞a
根据式子求a表示什么数?1.a＜-a2./a/=a3./a/=-a4./a/＞a
( )1.A maker space is where people make things according to their personal interests.
( )1.A maker space is where people make things according to their personal interests.