I'm writing nine postcards __________ my mother.[ ]
A. at
B. of
C. to
答案:C
糖尿病酮症酸中毒时,不符合的选项是()
A.血酮体>4.8mmol/L
B.血pH下降
C.血HCO下降
D.血PCO降低
E.血糖常>33.3mmol/L
标准麻花钻的顶角为140°。( )