A.They defend the bone against viruses. B.They prevent oxygen from entering the bone. C.They break down bone tissue. D.They connect the bone to muscle tissue.
【简答题】A. regions B. conformity C. trick D. hostility E. compulsory F. dialects G. discriminate H. tongue I. resident J. dominant K. fragmentation L. intimidate M. diverse N. expertise O. outweigh P. belittl...