| It is hard to predict how science is going to
turn out, and if it is really good science it is impossible to predict. If the
things to be found are actually new, they are by definition unknown in advance.
You cannot make choice in that matter. You either have science or you don’t
have, and if you have it you are obliged to accept the surprising and disturbing
pieces of information, along with the neat and promptly useful bits. The only solid piece of scientific truth about which I feel totally confident is that we are profoundly ignorant about nature. I regard this as the maj or discovery of the past hundred years of biology. It is, in its way, an illuminating piece of news. It would have amazed the brightest minds of the 18th century Enlightenment to be told by any of us how little we known and how bewildering seems the way ahead. It is this sudden conf A. They invented false theories to explain things they didn’t understand. B. They paid little attention to the problems they didn’t understand. C. They did not believe in results from scientific observation. D. They falsely claimed to know all about nature. [单选题]下述哪一项描述是正确的？（ ）
A.吸气是主动过程，呼气总是被动过程 B.吸气是被动过程，呼气是主动过程 C.吸气是主动过程，呼气可能是主动过程 D.吸气和呼气都是被动过程 [单选题]上树时，应使用安全带，安全带不得系在待砍剪树枝的（ ）附近或以上。不得攀抓脆弱和枯死的树枝；不得攀登已经锯过或砍过的未断树木。
A.A.茎部 B.B.断口 C.C.枝丫 D.D.根部 E.略 F.略 G.略 [判断题]作业成本核算法的计算步骤如下：(1)确定作业内容；(2)确定资源成本库；(3)确定作业成因；(4)计算作业成本。( )
[单项选择]不是影响生物利用度的因素是
A. 实验动物的影响 B. 年龄、疾病及食物等因素的影响 C. 非线性特性的影响 D. 肝脏首过效应 E. 胃肠道内的吸收 [单项选择]室性心动过速（）
A. 房性P波，房率160次／分，室率120次／分，房室4：3传导 B. 窦性P波，房率90次／分，室率170次／分，房室分离 C. 窦性P波，房率90次／分，室率55次／分，房室分离 D. 窦性P波。房率150次／分，室率150次／分 E. 窦性P波，房率50次／分，室率50次／分 [单选题]电缆直埋敷设施工前，应先查清图纸，再开挖足够数量的（），摸清地下管线分布情况，以确定电缆敷设位置，确保不损伤运行电缆和其他地下管线设施。
A.排水沟 B.样洞（沟） C.电缆工井 D.电缆沟 [单选题]CR400AF型动车组的换算长度、计算重量和最高运行速度分别是（）。
A.18.5；452.3t；380km/h B.19.0；472.3t；350km/h C.18.5；441.3t；380km/h D.19.0；506.3t；350km/h [单项选择]最准确的药物定量构效关系的描述是（）。
A. 拓扑学方法设计新药 B. HansCh方法 C. 数学模型研究分子的化学结构与生物活性关系的方法 D. Free-Wi1son数字加和模型 E. 统计学方法在药物研究中的应用 [单选题]每座油罐均设有一个量油孔,其直径( )mm。
A.100 B.120 C.150 D.180 [单选题]按《铁路技术管理规程》列车运行等级顺序，军用列车属于( )。
A.三等 B.五等 C.七等 D.九等 [单选题]项目监理机构( )在各自的工作职责范围内对相关监理资料的编制、整理承担相应责任。
A.资料员 B.各成员 C.专业监理工程师 D.总监理工程师 [判断题]SK6300-Ex便携式可燃气体探测仪由复合型防爆元件组成,可用于测量甲烷、乙炔、氢气等三十多种易燃易爆气体浓度,具有轻便、小巧、携带方便、快速检测等特点。( )
A.正确 B.错误 [多选题]生产经营单位的从业人员有依法获得安全生产保障的（ ），并应当依法履行安全生产方面的（ ）。
A.责任 B.权力 C.权利 D.义务 [单项选择]The private life of having each individual make his or her own choice of beliefs and interest （）without the overarching public world of the state, which sustains a structure of law appropriate to a self-determining association.
A. is not possible B. would not be possible C. will not be possible D. by which [单项选择]Nobody likes taking exams; exams (51) our own language can be stressful enough but somehow exams in a foreign language always seem to (52) more worry and anxiety. Well, the good news is that, if you (53) some simple steps, taking English language exams can be really quite (54) It won’t exactly be fun, but it certainly shouldn’t give you too many headaches or (55) nights.
If you are planning to (56) one of the well - known exams such as Cambridge First Certificate, you will probably find that there’s a preparation course (57) at a school near you. Cheek that the school has a good (58) of exam success and that the teacher is (59) . It is a good idea to ask if you will be given homework and (60) your written work will be marked by a teacher (61) knows the level of English (62) by the exam. If you take (63) exam preparation course, your teacher will give you all the A. painful B. painless C. enjoyable D. marvelous [单选题]“历览前贤国与家,成由勤俭败由著”对这句话的理解错误的是( )。
A.节俭节约是中华民族的优良品德 B.养成勤俭节约的习惯是大学生应有的社会责任 C.养成勤俭节约的习惯是大学生应有的道德素养 D.勤俭节约在物质丰富的今天已经过时了 [单选题]将数字化了的（）信号通过数字交换网络进行交换，实际上是时隙信息的交换。
A.无线 B.激光 C.话音 D.波分 [单项选择]以下关于数据传输速率的叙述，正确的是（）。
A. 数据的传输速率是调制解调器发送和接收数据的速度； B. 传输速率的单位有bps，Kbps和Mbps等； C. 数据传输速率是指每秒钟传送的二进制位数； D. 以上说法都正确 [简答题]何为摘挂列车？
[判断题]地震灾害事故消防车辆出动时，道路选择要以主要干道为主，需要通过桥梁时，要先查明其结构是否震坏，不能贸然通过。( )
A.正确 B.错误 [单选题]在ILS状态进近时，下滑指针在零位以下，说明（ ）。
A.A、飞机低于下滑道，飞机应拉升 B.B、飞机高于下滑道，飞机应下降 C.C、飞机低于下滑 道，飞机 应下降 D.D、飞机高于下滑道，飞机应拉升 [判断题]民用航空监察员凭民航局或地区管理局颁发的通行证进入机场控制区。
A.正确 B.错误 我来回答: 提交
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