更多“某次毒力测定中，农药浓度为10mg/L， 试虫矫正死亡率为5”相关的问题
头臂静脉由______与______汇合而成,汇合处的夹角为______。
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注射大剂量Ag形成免疫耐受是由于（）。
A . Ab形成速度慢，而代谢速度过快所致
B . Ab过剩，多余的Ag中和了抗体
C . 产生无功能抗体
D . 浆细胞麻痹
E . B细胞分化增生受到抑制
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根据《船舶最低安全配员规则》规定，无论何时（）不能同时离船。
A.船长和轮机长
B.船长和驾驶员
C.驾驶员和轮机长
D.驾驶员和轮机员
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Happiness If your sense of well-being fluctuates with stock market, you might be comforted to know that money can’t buy you happiness anyway. In one American study conducted in 1993, level of income was shown to have an inverse relation to happiness: The group whose income had declined was happier overall than the group whose income had increased. A soon-to-be published review of the hundreds of studies on this subject supports the 1993 findings. In developed countries, the correlation between income and happiness is close to zero and sometimes negative. With a correlation between level of income and happiness somewhere between 0.12 and 0.18, the United States is near the bottom of the list; that factors other than income are overwhelmingly more important in explaining happiness. Also, as our material wealth increases, the gap between income and satisfaction with life seems to be widening. Predictably, money has its most positive effect on the poor, but once a person has achieved a minimal standard of living level of income has almost nothing to do with happiness. Close relationship, rather than money, is the key to happiness. Indeed, the number of one’s personal friends is a much better indicator of overall satisfaction with life than personal wealth. One stands a better chance of achieving a satisfying life by spending time with friends and family than by striving for higher income. Incidentally, in the US, as people become richer, the probability of divorce increases. Our need for companionship is partly biological. All primates respond with pleasure to demonstrations of affection and with pain to loss of companionship. Isolated monkeys will sacrifice food just for the glimpses of another monkey. By ignoring our biologically programmed need for each other, we risk physical and mental distress. A recent cross-national study of mental depression in the US found that in advanced countries, there is a rising tide of major depression. Teenage suicides have increased in recent decades in almost all advanced countries. Moreover, in the US since World War II, there has been an actual decline in the proportion of people who report themselves to be "very unhappy." You can easily test the claim that companionship exceeds wealth as a source of happiness. Ask yourself which has a greater influence on your satisfaction with life: your income or the affection of your intimate companions and the well-being of your children Conversely, which would make you more depressed: a reduction in salary or a divorce and isolation from your friends Capitalism succeeds in creating material riches, but it is less successful in building companionable societies and protecting family integrity. But developing countries still have much work to do in pursuing material wealth, where a rise in productivity still greatly increases happiness. For poorer countries, the time is not yet ripe for a shift in priorities from wealth accumulation to companionship. Can we afford to believe that the pursuit of material gain will lead to self-fulfilhnent We should continue to enjoy our wealth in good company, or else we may find that it is not satisfying.
A．Loss of friends.B．Reduction of income.C．Death of a family member.D．Divorc
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B超：超声波：诊断______
A．雷达：天线：探测
B．冰箱；制冷剂：冷藏
C．相机：底片：摄影
D．电脑：显示器：工作
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（）可用来描述武汉的人文地理特征。
A.历史悠久
B.天下之中
C.九省通瞿
D.战略要地
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国务院办公厅国办发[2005]26号文件，对个人销售住房免征营业税的是( )。
A．单套建筑面积在120m2以下的住房转手交易时，免征营业税
B．住宅小区建筑容积率在1.0以上的住房转手交易时，免征营业税
C．实际成交价格低于同级别土地住房平均交易价格1.2倍以下的住房转手交易的，免征营业税
D．个人购买普通住房超过2年(含2年)转手交易的，免征营业税
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下列哪项不是脏腑辩证模型的特点？（）
A.对内伤疾病有较好的涵盖
B.对疾病发展阶段不清晰
C.对体质考虑较多
D.对新感和痼疾有很好的区分
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已知题38图所示电路换路前已处于稳态，t=0时开关S闭合，试用三要素法求换路后的电容电压uC。
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下列（）运行命令的作用是显示所有主机的端口号。
A.Netstat–r
B.Netstat–a
C.Netstat–s
D.Netstat–n
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用偏度和峰度两个指标来检查样本是否符合正态分布,以下描述错误的是( )。
A. 峰度大于0表示比正态分布平缓 B. 峰度小于0表示比正态分布陡峭 C. 偏度小于0表示右偏，大于0表示左偏 D. 偏度大于0表示右偏，小于0表示左偏
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反方向救援，正方向返回车站：连挂上被救援的列车正方向返回时，输入返回车次，将机车信号方向置于机车运行方向一致的位置，按（）方式运行，运行中严格按信号显示要求运行。
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自然界中生物的形态和特征是多种多样的，下列属于生物的是（）
A.溶洞中长高的石笋
B.会弹钢琴的机器人
C.逐年长高的生石花
D.狮子遗体
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电表是记录用电量的仪器，下列哪项中包含电表？（）
A.A
B.B
C.C
D.D
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题目内容
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参考答案
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（由十点题库聘请的专业题库老师提供的解答）
