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问题 单项选择题

假设3001C微基站安装在塔上，O1站型，采用9dBd天线，1/2"跳线长度5米（损耗11dB/100m），接头损耗0.5dB，双工器损耗为1.5dB，那么天线口功率EIRP为（）。

A、47.6

B、45.45

C、47.1

D、47.95

答案

参考答案：A

填空题


A Sports体育运动
Many animals engage in play，but homo sapiens is the only animal (1) have invented sports.Since sports are an invention，a part of culture (2) than an aspect of nature，all definitions of sports are somewhat arbitrary. (3) sports are a human universal found in every known culture or a (4) unique to modern society depends upon one’s definition of sports.Men and (5) have always run，jumped，climbed，lifted，thrown， and wrestled，but they have (6) always performed these physical activities competitively. Although all literate societies seem to (7) contests of one sort or another in which men， and sometimes women， (8) in displays and tests of physical skill and prowess，sports may be (9) defined as physical contests performed for their own sake and not for (10) ulterior end.According to this strict definition，neither Neolithic hunters nor contestants (11) religious ceremonies such as the ancient Olympic Games were engaged in sports. (12) on the stipulation that sports must be performed for their own sake (13) the paradoxical elimination of many activities which are usually thought of as (14) ，such as exercises done for the sake of cardiovascular fitness，races run (15) satisfy a physical education requirement，ball games played to earn a paycheck. (16) definition also means abandonment of the traditional usage in which"sport，"derived (17) Middle English disporter，refers to any light hearted recreational activity.In the. (18) of some 18th- century aristocrats，a game of backgammon and the seduction of (19) milkmaid were both considered good sport，but this usage of the term (20) become archaic.

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单项选择题

患者，女，32岁，继发痛经逐渐加重，月经周期正常，量中等。结婚2年，未避孕未怀孕。妇科检查外阴 * * 正常，宫颈光滑，子宫后位，稍大，活动不好。双附件增厚。B超见子宫稍大，肌壁有短线回声，双附件非纯囊肿。

若手术，最佳治疗方案为

A．剥除双侧卵巢囊肿

B．子宫及一侧附件切除

C．剥除双侧卵巢囊肿，切除子宫

D．电灼双侧卵巢囊肿

E．子宫及双附件切除
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