第8题: [单项选择]The author is primarily concerned with discussing how ______. A. economic and social conditions have changed B. technology for making war has improved C. armed conflict has changed D. war lost its value as a political tool 参考答案:D
第32题: [单项选择]含有内含子和外显子的RNA是()。 A. mRNA B. rRNA C. tRNA D. hnRNA E. snRNA 参考答案:D 答案解析:1.真核生物mRNA 3′-末端带有多聚A“尾”。 2.tRNA含有大量的稀有碱基如甲基化的嘌呤mG和mA、二氢尿嘧啶DHU以及次黄嘌呤等。 3.hnRNA即不均一核RNA,是mRNA的前体,DNA转
第33题: [单项选择]蚤咬肾指的是() A. 脂性肾病 B. 肾盂积水 C. 弥漫性硬化性肾小球肾炎 D. 毛细血管内增生性肾小球肾炎 E. 尿毒症 参考答案:D