[单项选择]The first national flags of the United States ______. A. represented the 13 colonies which won independence in 1776 B. were flown in American colonies in 1776 C. were flown in American colonies in 1795 D. gave representation to Congress
第10题: [单项选择]骨髓纤维化可见() A. 周围血中幼稚细胞、原始细胞>0.15% B. 周围血中有较多幼稚细胞伴嗜酸、嗜碱性粒细胞增多 C. 周围血中幼红细胞、幼粒细胞易见,骨髓呈现“干抽” D. 周围血中出现较多异形淋巴细胞 E. 周围血中易见盔形细胞、小球形细胞及破碎红细胞 参考答案:C 答案解析:骨髓纤维化血涂片中可见有核红细胞,多为中、晚幼红细胞。骨髓穿刺坚硬,常出现“干抽”。