A:dig out
B:give out
C:pick out
D:send out
A. robot B. umbrella C. hamburger D. shoes E. a cup of juice
F. fish G. noodles H. sandwich I. mouth J. a cup of coffee
我国水能资源最丰富的地区是( )
由直线y=x+1上的点向圆(x-3)2+(y+2)2=1 引切线,则切线长的最小值为( )