【单选题】【消耗次数：1】
患巨幼红细胞性贫血主要是由于缺乏( )。
①
蛋白质
②
铁
③
维生素B1
④
叶酸
参考答案：
复制
纠错
相关题目
【单选题】
巨幼红细胞性贫血应首选（ ）。
①
维生素<img class="kfformula" src="20200424/1587720710521391.png" data-latex="{B}_{12}" width="39" height="26"/>
②
维生素<img class="kfformula" src="20200424/1587720710740533.png" data-latex="{B}_{6}" width="37" height="25"/>
③
甲酰四氢叶酸钙
④
叶酸+维生素<img class="kfformula" src="20200424/1587720710202141.png" data-latex="{B}_{12}" width="38" height="26"/>
⑤
铁剂
随机题目
【单选题】
They also believe that building skyscrapers [填空] to solve the problem of the growing scarcity of land in the city.
①
help
②
helps
③
helping
④
to help
【单选题】
Chinese economic and trade exhibitions have[填空] the exchange of the advanced techniques with foreign countries.
①
promoted
②
provided
③
moved
④
risen