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Passage 6Coherence Coherence determines whether a speech is logical and thus makes sense. The speaker must make (31)______ that his utterances and paragraphs are presented in a logical sequence so that his thoughts and ideas are readily acceptable. A speech may be compared (32)______ a freight train. The locomotive is the thematic statement in a speech that gives the train (speech) its direction. Each car is an utterance in a paragraph or a paragraph in a speech that must follow the (33)______ of the train, for it must go where the locomotive goes. It is couplings that hold the cars together, ensuring that all the cars will arrive at same destination as the locomotive. (34)______ the same way, a speaker must supply the links between the utterances and paragraphs to give his listeners a directional signal to indicate (35)______ is to follow and how it (36)______ to what is preceded. Since transmitting ideas orally requires attention to the perceived coherence of speaker’s message, the audience do not have the luxury of going back (37)______ his points as they do in reading an essay; nor do they have punctuations that help them (38)______ one idea from another. Hence, speakers use signposts in the form of carefully worded phrases and sentences to help listeners (39)______ the movement of ideas within a speech and perceive the overall message structure. Summaries are (40)______ signposts in ensuring that listeners are able to see the overall structure: preliminary and final summaries are especially helpful in laying our or pulling together the major divisions of the speech.
甲、乙、丙三个油桶各盛油若干千克。第一次把甲桶的一部分油倒入乙、丙两桶，使乙、丙两桶内的油分别增加到原来的2倍；第二次从乙桶把油倒入丙、甲两桶，使丙、甲两桶内的油分别增加到第二次倒之前桶内油的2倍；第三次从丙桶把油倒入甲、乙两桶，使甲、乙两桶内的油分别增加到第三次倒之前桶内油的2倍，这样各桶的油都为16千克。甲、乙、丙三个油桶原来各有油多少千克？（ ）
下列关于“诚”与“信”的区分与联系，不正确的是（）。
C70型敞车车辆长度、车辆定距、车辆最大宽度、车辆最大高度（空车）、车体内长、车体内宽、车体内高分别为多少？
施加预应力的机具，应定期进行检验和校核，当千斤顶使用超过6个月或删次或在使用过程中出现不正常现象或检修以后应（）。
下列有关左心房增大影像表现，哪项不对（）
实现帧中继数据通信的最基本条件是什么？
我国日常用的合成洗涤剂中主要是阴离子表面活性剂，其中应用最广泛的是（）
缓冲器的吸收率越大，则反拨作用越大，冲动过程停止的越慢。
经全国人大及常委会和国务院的批准，（）可以拥有某些特殊的税收管理权。
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不属于后天性二尖瓣病变的是（ ）。
不属于后天性二尖瓣病变的是（ ）。
后天性二尖瓣狭窄的最主要病因为（ ）。
后天性二尖瓣狭窄的最主要病因为（ ）。
下列不属于晚期二尖瓣狭窄的超声心动图表现的是（ ）。
下列不属于晚期二尖瓣狭窄的超声心动图表现的是（ ）。
在二尖瓣水平短轴切面上，于舒张期图像上，有时见二尖瓣前叶的中部有连续中断现象，而不合并心内膜垫缺损，可能为
在二尖瓣口水平短轴切面上，于舒张期图像上，有时见二尖瓣前叶的中部有连续中断现象，而不合并心内膜垫缺损，可能为（ ）。
在二尖瓣口水平短轴切面上，于舒张期图像上，有时见二尖瓣前叶的中部有连续中断现象，而不合并心内膜垫缺损，可能为（ ）。
二尖瓣型P波（ ）。