第2题: [单项选择]急性溶血不常有的症状是() A. 寒战,高热,腰痛 B. 血红蛋白尿 C. 休克 D. 肝脾大 E. 肾衰竭 参考答案:D 答案解析:
贫血、黄疸、肝脾大为慢性溶血性贫血三大特征。
第3题: [单项选择]Consumers usually don't know ____________. A. where to buy cheaper things B. what materials are needed to improve finished products C. why they purchase some expensive products D. the brand names of products they buy regularly 参考答案:B 答案解析:[解析]事实细节题。文章第二段第二句指山“Yet too often consumers have no idea of...in selecting one product over another