划规是用工具钢制成的,两脚尖部要经过()硬化,并且要在使用时保持两脚尖的锐利。
A.淬火
B.回火
C.退火
D.正火
参考答案:A
Actually, Miss Zhang is not at all serious as she ____.[ ]
A. shows
B. performs
C. appears
D. behaves
糖尿病酮症酸中毒( )
A.口中有烂苹果味B.口中有尿味C.口中有肝臭味D.口中有大蒜味E.呼吸恶臭味