Our favourite food __________ dumpings.[ ]
A. am
B. is
C. are
D. be
答案:B
青少年肥胖的判断标准为()
A.头围小于胸围
B.胸围小于腹围
C.头围小于腹围
D.头围大于胸围
E.胸围大于腹围
绘图题:画出热继电器检验接线图。