增生是指细胞数目的增多同时伴有细胞体积的增大。()
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According to the conversation, the Dean will
A. sign the sheet in the faculty lounge.
B. take care of the bulletin board.
C. consult the students.
D. finalize the exam schedule.
中国共产主义青年团团旗的旗面为_______色,象征_______,左上角缀_______,周围环绕黄色圆圈,象征_______紧密团结在中国共产党周围。
已知某厂商总成本函数为TC=30000+5Q+Q2 ,试求:
(1)写出TFC、TVC、AFC、AVC、AC和MC的方程式
参考答案:TFC=30000 TVC=5Q+Q2
AC=30000/Q+5+Q AVC=VC/Q=5+Q
MC=5+2Q
(2)Q=3时,求TFC、TVC、AFC、AVC、AC和MC
TFC=30000
参考答案:TVC=5Q+Q2 +15+9=24
AC=30000/Q+5+Q=10000+8=10008
AVC=VC/Q=5+Q=8
MC=5+2Q=11 (
3)Q=50时,P=20,求TR、TC和利润或亏损额
The hotel company intends to have the system in______of its hotels in the next three months.
A. 2
B. 3
C. 100
D. 150