储存费用与订货数量成正比,订货费用与订货数量成反比。
查看答案
A4型题男,20岁,农民,在小河游泳后出现高热3天,伴畏寒、头痛、全身酸痛、乏力,于7月25日入院,体检,体温39.5℃,球结合膜充血,巩膜黄染,肝肋下1.5cm,质中,血象白细胞12.5×109/L,中性0.80,尿蛋白曙性,初步诊断为钩端螺旋体病。 为进一步确诊,拟行显微镜下凝集试验,该实验价大于多少有确诊意义()
A. 1:100
B. 1:200
C. 1:300
D. 1:400
E. 1:800
A4型题男,20岁,农民,在小河游泳后出现高热3天,伴畏寒、头痛、全身酸痛、乏力,于7月25日入院,体检,体温39.5℃,球结合膜充血,巩膜黄染,肝肋下1.5cm,质中,血象白细胞12.5×109/L,中性0.80,尿蛋白曙性,初步诊断为钩端螺旋体病。 下列哪项不是钩端螺旋体病的后发症()
A. 后发热
B. 虹膜睫状体炎
C. 反应性脑膜炎
D. 闭塞性脑动脉炎
E. 肾小球肾炎
我国雨水洪水型钩端螺旋体病主要由哪一群引起
A. 七日热群
B. 秋季热群
C. 澳洲热群
D. 黄疸出血群
E. 波摩那群
阅读下面短文,从短文后所给各题的四个选项([A]、[B]、[C]和[D])中选出能填入相应空白处的最佳选项。 Hundreds of years before the birth of Christ, the Celts --the (36) of parts of France and the British Isles-- (37) a festival at the beginning of every winter for the Lord of the Dead. The Celts believed that this god (38) the world in Winter (39) he called together the ghosts of dead people. On October (31) , people believed these (40) of the dead came back to earth in the (41) of animals. They thought that very bad. ghosts came back (42) black cats. (43) their festival on this day, the Celts (44) to make big fires to frighten the ghosts and chase them (45) . This celebration was the (46) of the holiday of Halloween. The Romans, who ruled the British Isles (47) , also held a (48) at the beginning of winter. Because this was harvest time, the Romans (49) apples and nuts for the Goddess of the garden. (50) the Christians added their customs (51) those of the Celts and the Romans. They had a (52) holiday on November 1 for the saints, (53) they called All Hallows’ or All Saints Day. The evening (54) this day was All Hallows’ Even ("holy evening"); (55) the name became Halloween.
A. like
B. as
C. on
D. by