第6题: [单项选择]Another big issue ______ the new republic is the problem of the education of its citizens. A. confining B. confirming C. conforming D. confronting 参考答案:D 答案解析:confront迎面遇到The soldiers were confronted by two terrorists as they left their camp;confront danger勇敢
第19题: [单项选择]以下花生四烯酸的衍生物,哪一种其有强烈地促进血小板聚集和血管收缩、促进凝血及血栓形成作用() A. PGI2 B. TXA2 C. PGE2 D. LTC4 E. PGA2 参考答案:B 答案解析:考点:必需脂肪酸。亚麻酸、亚油酸、花生四烯酸(二十碳多不饱和脂肪酸)、鱼油五烯酸等属于必需脂肪酸,体内不能合成,必须由食物中获得。前列腺素是不饱和脂肪酸的衍生物。当细胞受外界刺激时,细胞膜中磷脂酶A<