列车运行速度大于120km/h小于160km/h区段的道岔单点牵引道岔牵引点中心线处有4mm及其以上间隙时，密贴尖轨和心轨（）或（）表示。

[单选题]Passage1Soon after starting his job as superintendent of the Memphis，Tenn.，public schools，Kriner Cash ordered an assessment of his new district's 104，000 students. The findings were depressing：nearly a third had been held back at least one academic year. The high school graduation rate had fallen to 67%.One in five dropped out. But what most concerned him was that the number of students considered "highly mobile"，meaning they had moved at least once during the school year，had ballooned to 34，000，partly because of the home-foreclosure crisis. At least 1，500 students were homeless-probably more."I had a whole array of students who were angry，depressed，not getting the rest they needed，"Cash says. It led him to consider an unusual proposition: What if the best way to help kids in impoverished urban neighborhoods is to get them out？Cash is now calling for Memphis to create a residential school for 300 to 400 kids whose parents are in financial distress，with a live-in faculty rivaling those of elite New England prep schools. If Cash's dream becomes a reality，it will probably look a lot like SEED，a charter school in Southeast Washington，which stands for Schools for Educational Evolution and Development. Its  320 students-seventh-to 12th-graders-should live on campus five days a week. They are expected to adhere to a strict dress code and keep their room tidy. There are computers in the dorm's common areas, and each student in grades 10 and above is given a desktop computer. At 11:30 every night it's lights out.In his plan for Memphis, Cash wants even more time. Perhaps the most provocative aspect of his proposal is to focus on students in grades 3 through 5 for homelessness is growing sharply among kids at that critical age, when much of their educational foundation is set, Cash says. His aim: to prevent illiteracy and clear other learning roadblocks early, so the problem "won't migrate into middle and high school". Students will remain on campus year-round. The school would cost up to S50,000 a day to operate-three times the cost of a traditional day school with more than twice as many students."It sounds very exciting, but the devil is in the details." says Ellen Bassuk, president of the National Center on Family Homelessness in Newton, Mass.What is the passage mainly about?

[单选题]下列选项中不属于无机结合料稳定基层优点的是（　）。

[填空题]灾害调查、鉴定和评估工作由（）负责。

[问答题]试述国际市场营销与国际贸易的关系？

[判断题]中国哲学的总结者黄宗羲提出了“天地之化日新”的著名论断。

[单选题]新建一张空白的图纸，并用适当的命令和方法打开如下所示对话框，则在出现如下图所示的对话框之前必须完成的一步操作是（）。

[判断题]对于污泥量小的处理系统，可以采用间歇式重力浓缩池，最少可采用1座浓缩池。

[单选题]为防治工业生产等过程产生的废气、粉尘和恶臭，《大气污染防治法》规定（）。

[判断题]海上求生者，在4~10℃的海水中可生存的时间不超过5h。（）

[单选题]卖方利益险是供我国（）为保障自身的利益而投保的独立险别。

[填空题]列车运行速度大于120km/h小于160km/h区段的道岔单点牵引道岔牵引点中心线处有4mm及其以上间隙时，密贴尖轨和心轨（）或（）表示。

[填空题]列车运行速度大于120km/h小于160km/h区段的道岔单点牵引道岔牵引点中心线处有4mm及其以上间隙时，密贴尖轨和心轨（）或（）表示。

[填空题]区间及站内两相邻线路中心线间的最小距离规定如下：直线部分区间双线V≤120km/h为4000mm；120km＜V≤160km/h为（）mm；160km＜V≤20...

[填空题]区间及站内两相邻线路中心线间的最小距离规定如下：直线部分区间双线V≤120km/h为4000mm；120km＜V≤160km/h为（）mm；160km＜V≤20...

[判断题]允许速度为120km/h(不含)～160km/h的线路应铺设跨区间或全区间无缝线路，允许速度大于160km/h的线路应铺设跨区间无缝线路。

[判断题]允许速度为120km/h(不含)～160km/h的线路应铺设跨区间或全区间无缝线路，允许速度大于160km/h的线路应铺设跨区间无缝线路。

[单选题]大修地段与非大修地段的连接顺坡，应设在大修地段以外。其顺坡率为：允许速度不大于120km／h的线路不应大于（），允许速度为120km／h（不含）～160km／h...

[单选题]起道作业收工时，允许速度不大于120km/h的线路顺坡率不应大于2.0‰，允许速度为120km/h（不含）～160km/h的线路顺坡率不应大于1.0‰，允许速度...

[单选题]起道作业收工时，允许速度不大于120km/h的线路顺坡率不应大于2.0‰，允许速度为120km/h（不含）～160km/h的线路顺坡率不应大于1.0‰，允许速度...

[单选题]大修地段与非大修地段的连接顺坡，应设在大修地段以外。其顺坡率为：允许速度不大于120km／h的线路不应大于（），允许速度为120km／h（不含）～160km／h...