20. 植物是绿色的，因为它们的叶绿体吸收与利用绿光效率最高。
5. 下列哪项病理改变可引起绞痛______
At present
4. 无创通气的缺点有______
1. 下列哪些为治疗梅毒的常用药______
28. Country X's recent stock-trading scandal should not diminish investors' confidence in the country's stock market. For one thing, the discovery of the scandal confirms that Country X has a strong regulatory system, as the following considerations show. In any stock market, some fraudulent activity is inevitable. If a stock market is well regulated, any significant stock-trading fraud in it will very likely be discovered. This deters potential perpetrators and facilitates improvement in regulatory processes. In the argument, the portion in boldface plays which of the following roles?
某教育实验结束后测量出学生成绩数据一组
中心力场中电子自旋与轨道角动量存在耦合能，总角动量J=L+S．Φ是J2，L2，S2
10. Blues
23. 室间隔缺损常不伴有______
37. 既能清肺热、降肺气而化痰止咳，又能清胃热、降胃气而止呕止呃的药物是
A.前胡B.白前C.旋覆花D.杏仁
5. 治疗气血不足，疮疡脓成不溃或溃久不敛，常选用的药物是______
3. After the death of the dictator there was an unseemly scramble for power among the generals.
为尿潴留患者导尿的目的是______ A．测量膀胱容量 D．鉴别有无尿闭 C．排空膀胱
13. 我国如要建立法治国家，需要具备哪些条件______。
设等腰△A1B1C1的底边B1C1长为6，腰长为5。A2，B2
7. ICU感染的危险因素包括______
《乐记》和《系辞》中都有“天尊地卑”“方以类聚，物以群分”等文句，由于《系辞》的文段写得比较自然
某宿舍住着四个留学生，分别来自美国、加拿大、韩国和日本。他们分别在中文、国际金融和法律三个系就读