更多“使用VHF进行船岸间通信，通信频道应选择：（）”相关的问题
被取保候审人在取保候审期间有下列（）行为的，公安机关可以责令其重新交纳保证金。
A.违反规定擅自外出，被依法没收保证金的
B.又犯新罪，正在侦查的
C.移送审查起诉后，被检察机关重新决定取保候审的
D.违反规定，被依法没收部分保证金的
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各感觉器官对其感受信号变化的感觉，不仅取决于信号变化的绝对量，还取决于信号变化的相对增量。
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下列哪种情况较少引起高钾血症（）
A.肾素-血管紧张素系统异常 B.碱中毒、胰岛素过多 C.肾衰 D.组织破坏、烧伤 E.长时间存放的血标本、体外溶血
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某建筑工地，一名在30m高的吊塔上工作的电焊工在收工时，不慎掉落一根长约40cm，直径约4mm的电焊条，不偏不倚扎在地面上一名正仰头张望的工人左眼眶里，伤及眼球。经医生努力医治才保住这名工人的眼球。（事故原因分析）：（）
A . 登高作业的焊工，设有使用专用工具袋
B . 现场管理不力，登高作业点消防地面没有设栏隔裆的范围
C . 这名工人缺乏自我保护意识，擅自进入高空作业点下方危险区内
D . 未挂安全带挂钩
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硝酸酯类与β受体拮抗药联合应用，不利于治疗心绞痛的原因是A、作用机制不同产生协同作用B、降低血压
硝酸酯类与β受体拮抗药联合应用，不利于治疗心绞痛的原因是 A、作用机制不同产生协同作用 B、降低血压 C、缩短射血时间 D、消除反射性心率加快 E、降低室壁肌张力
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足球比赛中掷界外球时接球队员不受越位规则的约束。
A.对 B.错
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经过反复应对不能奏效，对应激情景无法控制时产生的应激行为反应是
A . 逃避B . 退化C . 攻击D . 无助
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起源于上皮组织的恶性肿瘤称为?
A. 癌症 B. 癌 C. 肉瘤 D. 癌肉瘤
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在选择装潢材料是，你一般首先考虑（）
A.价格便宜
B.环保安全
C.美观时尚
D.知名品牌
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能使无关变量在显示装置上产生的信号影响减小的电路是以什么为基础的？（）
A.振幅差；
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设 A 与 B 是两个事件,已知 P(A)=0.4,P(B)=0.3,P(AB)=0.2 , 则
A. 0.1 B. 0.18 C. 0.19 D. 0.15
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American culture has not been immune to cultural influences from outside. The idea of democracy came from the ancient Greeks; the Industrial Revolution started in England; jazz and rock music preserve African rhythms—to pick a few examples. Indeed, many of the things we think of as "100 percent American" came from other cultures. Still, most of the changes in American culture over the last century have come from within, as the result of inventions and discoveries. And change has been dramatic. One hundred years ago the United States was largely a nation of farmers. Many of the things we take for granted today—a high school education, for example, or indoor plumbing—were luxuries then. The moon was a light for lovers, not a site for scientific exploration; genetic engineering (基因工程) was not even a subject for science fiction, much less for laboratory research and corporate investments. The decades following the Second World War, in particular, were characterized by spectacular scientific and technological advances, national self-confidence, optimism, and (for many Americans) prosperity. The American economy was the strongest in the world: more goods were produced and sold, more people were working, and the standard of living was higher than ever before. Polls (民意调查) taken in the 1950s and 1960s show that the average American was preoccupied with the questions "will I make a good living" "Will I be successful" and "Will I raise successful, happy children" Success was defined in terms of maintaining a stable family and "keeping up with the Jones". Most Americans believed that if they played by the rules—if they work hard and did what was expected, if they sacrificed their own needs to those of their family and their employer—they would be rewarded with an ever-increasing standard of living, a devoted spouse, and decent children. An expensive car, a suburban home, and children in college were tangible (可触知的) signs that hard work and self-sacrifice paid off.
A．The influence of African culture.B．The American culture changes in 1970s.C．The influence of American culture.D．The development of science and technology.
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在公司制企业下，下列筹资方式中，属于可以避免收益向外分配时存在的双重纳税问题，在特定税收条件下减少投资者税负的手段的是（）。
A. 发行普通股B. 发行优先股C. 吸收直接投资D. 利用留存收益
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目视飞行直升机使用同一起飞着陆区起飞、着陆时，最低间隔标准应当符合如下规定：先起飞、着陆的直升机离开起飞、着陆区之前，后起飞的直升机（）。
A.不可以开车
B.不得进入起飞着陆区
C.可以开始起飞
D.不得开始起飞
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