细菌毒素中毒性作用最强的是（）A.肉毒毒素 B.白喉外毒素 C.肠毒素 D.溶血毒素

制度创新是人类社会发展进步的一个重要表现。阅读下列有关我国古代政治制度的材料，结合所学知识，回答下列问题：

材料一：丞相王绾等言：“诸侯初破，燕、齐、荆地远，不为置王，毋以填之，请立诸子，唯上幸许。”廷尉李斯议曰：“周文、武所封子第同姓甚众，然后属疏远，相攻击如仇雠（仇敌），诸侯更相诛伐，周天子弗能禁止。今海内赖陛下神灵一统，皆为郡县，诸子功臣以公赋税重赏赐之，甚足易制。天下无异议，则安宁之术也，置诸侯不便。”始皇曰：“天下共苦战斗不休，以有侯王。赖宗庙，天下初定，又复立国，是树兵也，而求其宁息，岂不难哉！廷尉议是。”～《史记·秦始皇本纪》

材料二：《元朝疆域图》

请回答：

⑴材料一反映了西周和秦朝什么行政制度？（2分）

⑵材料二反映了元朝的什么行政制度？其实施目的在哪里？有何积极意义？（3分）

⑶元朝时台湾有何别？（1分）

⑷元朝负责管理藏族地区行政事务的重大机构是什么？（2分）

课文精彩回放。

1．于是夸父拿着手杖，提起长腿，迈开大步，像风似的奔跑，向着西斜的太阳追去，一眨眼就跑了两千里。 “一眨眼就跑了两千里”形容夸父                    。 “像风似的奔跑”采用了                的写法。

2．西门豹把巫婆和官绅头子扔下河后，官绅们跪下磕头求饶，西门豹没有立刻放过他们，而是说“再等一会儿”，过了一会儿，西门豹才让他们回去。是因为[ ]

A．西门豹对是否把官绅们扔进漳河感到犹豫。   

B．彻底制服官绅们，达到破除迷信，教育百姓的目的。

《罗密欧与朱丽叶》的故事以1303年发生在（）的真人真事为基础，最早出现在意大利作家科尔太的《维罗纳的故事》一书中，在彭德罗的短篇小说中也有这个故事。

(46) Many journalism critics have recently argued that American journalism is undergoing a profound change because it now regularly mixes entertainment with the news. Critics typically argue that this entertainment is in the form of sensationalistic celebrity-scandal. In fact, there is a long history of sensationalism in American journalism, a fact documented by several journalism historians. (47) But the main point of contemporary critics is that sensationalism and tabloid-style techniques, which were always present on the fringes of journalism, are now becoming the norm in American journalism, and are being adopted by so-called "mainstream" media as part of economic survival strategies in the cutthroat business climate of American mass media. These contemporary critics typically argue that there should be a rigid boundary between mainstream journalism and other kinds of mass communication such as tabloid journalism. (48) The critics imply that one kind of communication is more legitimate in certain contexts than the other, and even that tabloid journalism is not journalism at all but is instead entertainment. One of the claims made by mass media critics is that journalism just recently got worse. But this may be a perennial complaint.
(49) A quick review of journalism criticism reveals that the argument that journalism used to be better but just recently got worse is common throughout the history of journalism. The critiques usually say that journalism used to make bold distinctions between news and entertainment but now combines the two. These critiques construct the logical conclusion that journalism has steadily declined in quality over many years. (50) Taken together, the criticisms add up to the conclusions that the people who used to do journalism were better and had higher standards than those of today and that the distinctions between news and entertainment used to be greater. Examples of this critique can be found in even the earliest discussions of American journalism.
For instance, critics panned Benjamin Day’s New York Sun of the early 1830s because it often contained humor and sensational news of suicides. Similarly, some critics hated James Gordon Bennett’s New York Herald of the mid-to late-1830s because it contained entertaining satirically written police court reports, as well as in-depth crime stories. Bennett pioneered the "human-interest story" or feature story when he wrote in vivid detail in 1836 about the grisly murder of the prostitute Helen Jewett, quoting her madam and describing Jewett’s apartment in minute detail. Bennett’s day-by-day narrative of the ensuing sensational trial reminds us of how journalism and entertaining literature have been combined for many years to make newsworthy stories "more palatable for consumption. " Bennett was soundly criticized by his competitors and others for blurring the boundary between journalism and entertainment. His detractors, many of them his competitors, waged what they called a "Moral War" in the late 1830s against Bennett and his enjoyable but sensationalistic newspaper. They maintained that Bennett was a "deviant" journalist because he blurred the boundaries of journalism by making his newspaper entertaining and popular. Those running the "Moral War" against Bennett were unsuccessful at running him out of the journalism business, but they did seriously wound his business.

在机械方面有哪些情况需作紧急停车处理？