已知矩阵，若矩阵X和Y满足： X2+XY=E，A(X+Y)B=E，则矩阵Y=___

Story     hand      spend      take      unlucky

Dear classmates,

It’s March again. Don’t forget the important project this month----learning from Lei Feng. Would you like to give a _____81_____ to people who need help?

How about _____82_____ some time with the children in the orphanage? We will play games with them and tell them _____83_____. If possible, we will teach them how to make dumplings. Without the love of parents, they are _____84_____. Why not bring them some gifts to add a little cheer to their life?

Want to join us? Let’s meet at 7:00 at the school gate this Saturday. The school bus will _____85_____ us there. Don’t be late.

Students’ Union

我国地形图中，（）采用6°分带法。

A.1：1万

B.≥1：1万

C.1：50万

D.1：2.5—1：50万

以下哪项不是禁止生产的食品( )

A．未经有关卫生行政部门的审核，批准而生产的食品
B．掺假、掺杂、伪造，影响食品营养、卫生的
C．腐败变质、霉变、生虫，有异样感官性状，可能对人体健康造成危害的
D．用非食品原料加工的，加入非食品用化学物质的或者将非食品当做食品的

施工总承包单位可以依法将承包范围内的（）工程分包给具有相应专业资质的企业。

A.地下室混凝土结构

B.填充墙砌筑作业

C.混凝土框架结构

D.机电设备安装

E.玻璃幕墙

工作分析的方法。