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关于通信网的说法，正确的是（）。
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只有实质细胞而没有间质细胞的恶性肿瘤是
What do we leam about Ana Castro from the last paragraph?阅读材料，回答下面的题目。 Deport them or notIn a country that defines itself by ideals，not by shared blood，who should be allowed to come，work and live here?In the wake of the Sept．1 1 attacks these questions have never seemed more pressing．On Dec．11，2001，as part of the effort to increase homeland security，federal and local authorities in 14 states staged“Operation Safe Travel”-raids on airports to arrest employees with false identification(身份证明)．In Salt Lake City there were 69 arrests．But those captured were anything but terrorists，most of themillegal immigrants from Central or South America．Authorities said the undocumented workers’illegal status made them open to blackmail(讹诈)by terrorists．Many immigrants in Salt Lake City were angered by the arrests and said they felt as if they were being treated like disposable goods．Mayor Anderson said those feelings were justified to a certain extent，“We’re saying we want you to work in these places，we’re going to look the other way in terms of what our laws are，and then when it’s convenient for us，or when we can try to make a point in terms of national security，especially after Sept．1 1，then you’re disposable．There are whole families being uprooted for all of the wrong reasons，”Anderson said．If Sept．1 1 had never happened．the airport workers would not have been arrested and could have gone oil quietly living in America．probably indefinitely．Ana Castr0，a manager at a Ben＆Jerry’s ice cream shop at the airport，had been workin9 10 years with the same false Social Security card when she was arrested in the December airport raid．Now she and her family are living under the threat of deportation(驱逐出境)．Castro’s case is currently waiting to be settled．While she awaits the outcome，the government has granted her permission to work here and she has returned to her job at Ben&Jerry’s．According to the author，the United States claims to be a nation__________．
有利于中国劳动者就业的情况是（ ）。回答问问题某大学课堂上，一位教授指出，劳动力供给涉及劳动力供给数量和劳动力供给质量两个方面的问题，一国的经济发展既取决于劳动力数量，也取决于劳动力质量。目前，我国的劳动力供给数量增长速度放缓，劳动力质量未能实现较快的提高。此外，一个国家的劳动力资源利用情况可以从就业中反映出来，教授指出，对中国劳动者就业产生影响的近期动向有以下两个：一是由于中国的劳动力成本不断上升，国际上一些知名的大公司已经开始将原来委托中国企业生产加工的很多产品收回到本国生产；二是随着技术水平的不断进步，很多资本设备的价格不断下降。最后，教授还强调，影响劳动力需求弹性的因素会对劳动力的就业产生影响。根据以上资料，回答下列问题：劳动力供给质量包括的内容有（ ）。
大量不保留灌肠操作中，以下步骤正确的是
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