冰的体积是:1+111=1211,
冰与水的体积比:1211:1=12:11;
故答案为:12:11.
If you get pimples, you should _____. [ ]
A. drink lots of water
B. take more medicine every day
C. call 120 at once
D. feel shy and sad
已知△ABC中,
,则cosA=().
A.A
B.B
C.C
D.D