下列哪项不是缺铁性贫血缺铁早期的实验室指标()
A.铁粒幼细胞正常
B.红细胞形态正常
C.网织红细胞计数正常
D.血清铁减少
E.骨髓小粒染色铁正常或减少
参考答案:D
Although he has failed many times, he keeps _____ hard to make his dream come true.
A. working
B. to work
C. worked
患者,男性,36岁,因咳嗽发热前来就诊,医嘱给予青霉素80万U肌内注射,每日2次。
0.1ml青霉素皮试液含青霉素()。
A.10U
B.50U
C.100U
D.200U
E.300U