第3题: [单项选择]Difficulties and hardships have ______ the best qualities of the young geologist. A. brought about B. brought forth C. brought out D. brought up 参考答案:C 答案解析:辨义:A.brought about使发生,致使(行为);B.brought forth引起,产生(结果);C.brought out使显出,表现出;D.brought up教育,培养。据句意,C为正
第22题: [单项选择]What is the most important function of trees A. Providing fuel. B. Offering shade. C. Preventing natural disasters. D. Providing charcoal. 参考答案:C 答案解析:[解析]由第二段首句“...the third of these services is the most important.”可知选C。
第27题: [单项选择]临床上患者尿检查中,检出异常对诊断多发性骨髓瘤意义最大的是 A. 蛋白尿(++++) B. 血尿 C. 蛋白管型尿 D. 上皮细胞 E. B-J蛋白 参考答案:E 答案解析:[解析] 骨髓瘤患者合成大量M蛋白,超过肾脏的重吸收能力即会出现溢出性蛋白尿,其本质是免疫球蛋白的轻链κ或λ链,又称B-J蛋白。