右图所示血液成分中,数量过少会导致贫血的是( )
A.①
B.②
C.③
D.④
答案:B
—Thank you for sending my mother home.
— .
A.It’s my pleasure.
B.You’re right
C.Sounds terrible
D.I’m sorry
下列属于微需氧菌的是
A.破伤风杆菌B.脑膜炎双球菌C.幽门螺杆菌D.结核分支杆菌E.产气荚膜杆菌