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题目：
单选题
ABUS
BERCP
C口服法胆囊造影
DPTC
E十二指肠引流术
答案：
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Every country has traffic rules and signs, but are they the same? In most countries, there are street and road signs with 21________ about location,directions,dangers,cautions, and rules of the road. These 22 _________ tell drivers and pedestrians what to do and what not to do,including speed and parking 23 ________,places to stop,when to make turns,and other 24________.However, specific local traffic laws and practices usually differ around the world. For instance, in Japan, Indonesia, South Africa, the United Kingdom, and other countries ,steering 25________are on the right side of vehicles ,and cars and trucks drive on the left side of the road. In other 26 _________,such as the United States,Saudi Arabia,Italy, and Mexico,steering wheels are on the left side of vehicles ,and cars and trucks 27________on the right side of the road. An illustration of a local 28________law is the regulations for pedestrian and school 29 ________ in some Mexican cities:drivers rarely respect the rules,so for safety, people cross streets only at stop lights, on roads with little traffic, or on pedestrian-only 30 _________ across wide avenues.
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简述核素显像的基本原理及与一般结构显像的不同。
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一个用双符号位表示的变形补码01.1101代表溢出。()
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卡茨认为，管理者需要三种技能：概念技能、人际技能和技术技能，其中技术技能对()最重要。
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对于民用建筑，评价指标的选取比工业建筑简单得多。()
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经行泄泻肾虚证的腹泻特点是（）
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1927年到1932年，以哈佛大学心理学家梅奥为首的一批学者，在美国西方电器公司下属的霍桑工厂所进行的一系列实验总称为（）。
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单滚筒采煤机滚筒的转向是向外回转。
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前苏联（）1986年发生大爆炸事故后，世界上许多人对核电站产生了极大的恐惧心理，真有点谈核色变。后来，许多人坚决反对再建核电站，甚至在核电站附近组织示威。
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在外电源正常向飞机电网供电过程中，电源控制面板上的电压指示值是（）