A cat a tail. [ ]
A. having
B. haves
C. has
答案:C
横骨上廉至内辅骨上廉的骨度分寸是
A.12寸B.13寸C.16寸D.18寸E.19寸
你做过这个实验吗?请你填出如图实验中正极产生______,负极产生______.