A:0
B:34
C:1
D:54
因为 34 × 56 × 85 =1,所以 34 、 56 和 85 互为倒数。
The Monkey King can make the stick so_______that he can put it into his ear.
I ________ up at five o'clock.
不论x、y取何数,代数式x2 + y2 − 4x -2y + 8的值均为( )