当边际产量递减时,下列关于边际成本的说法中,正确的是()
A.开始的时候递增,后来递减
B.开始的时候递减,后来递增
C.递增
D.不变
参考答案:C
Peter and I are good friends. Peter is an American boy. I am a Japanese girl. He is thirteen. I am twelve. We are in the same class,Class Two.
Peter has a nice clock. He likes it very much. He puts it on his desk. Every morning it wakes him up(叫醒他). I have a new watch. It looks beautiful. I wear(戴)it every day. It tells(告知) me the time.
小题1:Peter and I are ________.
小题1:
A.sisters
B.teachers
C.friends
D.brothers小题2:Peter is ________.
小题2:
A.an English boy
B.a Japanese girl
C.an American boy
D.an English girl小题3:I have ________.
小题3:
A.a purple clock
B.an old watch
C.a new watch
D.a nice clock小题4:Peter ________.
小题4:
A.wears his clock every day
B.puts his clock on his desk
C.wears his new watch every day
D.likes his new watch very much小题5:Peter and I are ________.
小题5:
A.in different classes
B.in the same row
C.in Class Two
D.in America
It was very hard for me to make a—but J decided to leave my job
A suggestion B decision C plan D speech