同一专业系统中的上级主管业务部门与下级主管业务部门之间属指导与被指导的关系。 ( )
参考答案：对
“It is not only you but also Tom who _________,” said the teacher after knowing what had
happened.
A．are to be blamed
B．is to be blamed
C．are to blame
D．is to blame
请你写出一个单项式，使它的系数为﹣1，次数为3．答：（ ）．
