用铁剂治疗缺铁性贫血,疗效出现最早的是()
A.血红蛋白增加
B.网织红细胞增加
C.红细胞体积增大
D.红细胞平均血红蛋白量增多
E.红细胞计数增多
参考答案:B
The Renaissance is actually a movement stimulated by a series of historical events EXCEPT ______.
A. the rediscovery of ancient Roman and Greek cultureB. the vast expansion of British colonies in North AmericaC. the new discoveries in geography and astrologyD. the religious reformation and the economic expansion
利用中国期刊全文库(CNKI)的专业检索,检索发表在《复合材料学报》上的有关纳米CaCO3增韧聚氯乙烯复合材料的文献,最佳检索式为()
A.关键词=碳酸钙and关键词=聚氯乙烯and关键词=增韧
B.关键词=(碳酸钙and聚氯乙烯and增韧)and刊名=复合材料学报
C.关键词=(碳酸钙and聚氯乙烯and增韧)and刊名=复合材料学报
D.关键词=碳酸钙and关键词=聚氯乙烯and关键词=增韧and刊名=复合材料学报