高压蒸汽采暖系统的压力为（）以上。

[填空题]光纤通信在进行长距离传输时，由于光纤中存在损耗和色散使得光信号（）降低、光脉冲发生展宽。

[多选题]以下属绳索类逃生避难器材的是（）

[单选题]压力开关208的动作压差为（）kPa。

[问答题]试比较无刷直流电动机和有刷直流电动机的转矩公式、转速公式和机械特性。

[多选题]期间费用在利润表中的列示顺序通常依次为（）

[单选题]请阅读 Passage 2，完成第 26~30小题。Passage 2Scientists have found that although we are prone to snap overreactions，if we take a moment and think about how we are likely to react，we can reduce or even eliminate the negative effects of our quick，hard-wired responses.Snap decisions can be important defense mechanisms; if we are judging whether someone is dangerous，our brains and bodies are hard-wired to react very quickly，within milliseconds.But we need more time to assess other factors.To accurately tell whether someone is sociable，studies show，we need at least a minute，preferably five.It takes a while to judge complex aspects of personality，like neuroticism or open-mindedness.But snap decisions in reaction to rapid stimuli aren't exclusive to the mterpersonal realm. Psychologists at the University of Toronto found that viewing a fast-food logo for just a few milliseconds primes us to read 20 percent faster，even though reading has little to do with eating.We unconsciously associate fast food with speed and impatience and carry those impulses mto whatever else we're doing.Subjects exposed to fast-food flashes also tend to think a musical piece lasts too long.Yet we can reverse such influences.If we know we will overreact to consumer products or housing options when we see a happy face(one reason good sales representatives and real estate agents are always smiling)，we can take a moment before buying.If we know female job screeners are more likely to reject attractive female applicants，we can help screeners understand their biases-or hire outside screeners.John Gottman，the marriage expert，explains that we quickly"thin slice" information reliably only after we ground such snap reactions in"thick sliced" long-term study.When Dr.Gottman really wants to assess whether a couple will stay together，he invites them to his island retreat for a much longer evaluation: two days，not two seconds.Our ability to mute our hard-wired reactions by pausing is what differentiates us from arumals:dogs can think about the future only intermittently or for a few minutes.But historically we have spent about 12 percent of our days contemplating the longer term.Although technology might change the way we react，it hasn't changed our nature.We still have the imaginative capacity to rise above temptation and reverse the high-speed trend.Our reaction to a fast-food logo shows that snap decisions ____.

[判断题]儿童早期学习数数是由唱数直接到说出总数。

[单选题]患者，女，27岁，高级工程师，经常加班熬夜，近期因智齿冠周炎引起的右侧升支外侧慢性边缘性颌骨骨髓炎，经消炎治疗后局部仍有肿胀，下一步最佳的处理是（）

[填空题]在性质判断中，主项和谓项都周延的是（）判断。

[问答题]试述近代教育变化的特别表现。

[单选题]高压蒸汽采暖系统与低压蒸汽采暖系统划分的蒸汽（绝对）压力是（）。

[单选题]高压蒸汽采暖系统与低压蒸汽采暖系统划分的蒸汽（绝对）压力是（）。

[单选题]高压蒸汽采暖系统一般采用（）

[单选题]高压蒸汽采暖系统的压力为（）以上。

[多选题]下列哪几项高压蒸汽采暖系统凝结水管的设计室正确的？（）

[单选题]高压蒸汽采暖系统的管道，一般采用（）连接。

[多选题]采暖系统为高压蒸汽时用什么方式连接？（）

[单选题]蒸汽采暖系统是靠（）放热。

[单选题]蒸汽采暖系统的缺点是（）

[单选题]蒸汽采暖系统应当采用（）。