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根据《建筑地基基础工程施工质量验收规范》（GB 50202），基坑内明排水应设置排水沟及集水井，排水沟纵坡宜控制在（）。
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Read with Greater Speed
Do you have difficulty reading in class？ If so， a special reading program that helps match sounds with letters could speed up your brain.
At least one out of every five elementary school students in the US has trouble learning to read， even when the students are good at other subjects.__________ （46） Researchers from Yale University， US， studied a group of children from New York and Connecticut State. As part of the study， 37 struggling readers received special tutoring.
Every day， instructors worked with them on recognizing how written letters represent units of sound called phonemes （音素） . __________ （47）
By the end of the school year， these children could read faster than before. They also made fewer mistakes， and understood more of what they read than they could earlier in the year.
As part of their study， the researchers used a special machine to take action photos of the students" brains.__________（48） This is the same part of the brain that becomes active when good readers read， This activated brain area appears to include a structure that helps people recognize familiar written words quickly. In lower level readers， this structure remains inactive.
A year later， the brain structure was still working hard in the students who had gone through the special tutoring， and they continued to do well in reading tests. __________ （49） However， some researchers still doubt the study.__________ （50）
回答（46）题 查看材料
关于塔式起重机安全控制要点，下列表述中，不正确的是（）。
比较中国实行计划经济和现在实行市场经济不同时期的政府职能变化情况。
简述提高政府绩效的预算原则。
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