[单选题]五四运动是什么时候爆发的。( )
A. 1918年5月4日
B. 1919年5月4日
C. 1920年5月4日

立即服大量蛋白水或牛奶

立即服大量蛋清

立即服泻药

立即服大量的韭菜

及时清除口腔内玻璃碎屑

患者，男，32岁，工人。因腹胀、尿少、下肢肿胀11个月入院。既往有乙型肝炎病史8年。查体：神清，少语，精神弱，定时定向力正常，计算力差，巩膜轻度黄染，腹部高度膨隆，腹壁浅静脉怒张，移动性浊音阳性，肝脾触诊不满意，肝掌，前胸散在蜘蛛痣，下肢浮肿。治疗经过：患者入院第3日，大便后突然出现上腹部剧痛，面色苍白，呕出鲜红血液约800mL，脉搏134次／min，血压68/38mmHg，经药物及三腔二囊管治疗，停止呕血，在随后的几日里陆续排出柏油样便。入院10日逐渐出现躁动，并伴有高声喊叫，随后陷入昏迷，各种反射迟钝甚至消失，肝臭明显，抢救无效死亡。尸检：皮肤及巩膜中度黄染，腹腔内有黄色澄清液体约4500mL。肝脏：重890g（正常1500g），表面和切面均可见直径为0.5～1cm的结节。镜检肝小叶正常结构破坏，代以假小叶，多量纤维组织增生。脾脏：重860g，镜检脾窦高度扩张充血，内皮细胞增生，脾小结萎缩。食管下段黏膜静脉丛明显曲张。
（1）请对本病原发病作出诊断，并写出诊断依据。
（2）结合病例，分析可能引起本病的原因。
（3）分析出现呕血的原因。
（4）分析出现腹水的原因。

Many people believe that Americans love their cars almost more than anything else. They are (21) about cars. Not only is the car the (22) means of transportation in the States, it has (23) become a "plaything". (24) the time youngsters become fourteen years old or even (25) , they’re likely to start (26) of having their own cars.
In the USA, the (27) family, if the father is not (28) work, can afford to buy a new car every five years. However, many young people (29) after school in order to save money to buy a car. Learning to drive and getting a driver license may be one of the most exciting (30) of a young person’s life. Driver (31) is one of the most popular courses. At the end of the course the student will (32) a driving test for a license. (33) many, that piece of paper means that they have grown up.
In the United States, many men and women (34
A. From
B. By
C. At
D. Until