商品条码主要应用于商店内的()。A.POS系统 B.EDI技术 C.射频识别系统 D

患者女，48岁。右上腹突发持续性疼痛伴寒战、发热及恶心、呕吐13小时。既往有原发性肝胆管结石病史。查体：体温39.8℃，呼吸24次/分，脉搏108次/分，血压78/60mmHg。神志淡漠，烦躁不安，全身皮肤、巩膜黄染，皮肤有抓痕。剑突下和右上腹有压痛及反跳痛，腹肌紧张不明显。尿量<20ml/h。实验室检查：WBC3.5×10⁹/L，N0.85，中性粒细胞核左移。血、尿淀粉酶正常，血清总胆红素160μnol/L，ALP298U/L，ALT80U/L。

最有效的治疗措施是（）

A.输血、输液补充血容量

B.手术解除梗阻、引流

C.全身抗感染治疗

D.纠正酸中毒

E.维持肝、肾功能

毒物的蓄积作用是引起何种中毒的物质基础（）.

A.急性中毒

B.慢性中毒

C.迟发性中毒

D.亚急性中毒

E.化学致癌

自由议付信用证可规定（）的任何银行自由议付。

A.全世界

B.出口国

C.出口国的一个城市

D.某一银行设在国外的分行

E.某一银行在国外的代理行

Man first appeared on the earth about 2 million years ago. Then he was little more than an animal; but early man had a big advantage over the animals. He had in his brain special groups of nerve cells, not present in animals that enabled him to invent a language and use it to communicate with his fellow men. 46) This ability to speak was of great value because it allowed men to share ideas, and to plan together, so that tasks impossible for a single person could be successfully undertaken by intelligent team-work. Speech also enabled ideas to be passed on from generation to generation so that the stock of human knowledge slowly increased.
It was this special ability that put men far ahead of other living creatures in the struggle for existence. 47) He mastered darkness first with dim lights and later with brighter and brighter lamps, until he can now make for himself so dazzling a light with an are lamp that, like the sun, it is too p for his naked eyes.
48) Man found that his own muscles were too weak for the work which he wanted to do; he explored many other forms of power until now he has his hands on the ultimate source of physical energy, the nuclear power. From man’s earliest days the flight of birds has raised his wonder and desire. Why should he not fly as they did Then he began to experiment. At last he learnt how to make the right machines to carry him through the air. Now he can fly faster than sound. Already he has plans for conquering space, and a series of experiments has been completed. 49) It will not be long now before man takes a giant step away from his planet and visits the moon, learning what it is like to have no weight to his body, no upward direction and no downward.
Man, always a wanderer, has to overcome the difficulty of adapting himself to different climates. 50) Fortunately, in spite of having no. thick skin or warm fur to protect him, he is peculiarly p compared with other living creatures, most of whom are unable to live far outside the region that suits them best.

经调平机构调平后的高空作业机械，其作业平台在任一工作位置均应保持水平状态，平台台面与水平面的夹角不超过（）。

A、1.5°

B、3°

C、8°

D、15°