A data warehouse is a subject-oriented data set used for reporting and analysis.Data warehouses can be subdivided into（）,which store subsets of data from a warehouse.
The demoralizing environment, decrepit (老朽的)building and minimal materials make the high school experience for these children an uphill baffle. Merely graduating from such a high school is difficult, much less becoming a high-caliber science or engineering student. Schools with students from a higher socioeconomic level would not tolerate the obstacles I encountered daily. Improvements need to be made efficiently and made soon, or the divisions among people in this country will only become more extreme.
Of course, there are things that concerned citizens can do to help. Get involved with a school, especially one in a poor area. Volunteer to give a presentation or just to spend time with the children. My students were excited to talk to an insurance salesperson who came to give a career exploration lecture. They not only were genuinely interested in the opportunities he described but also were amazed that such a man would donate an afternoon to them.
Although those
A. the divisions among people results from their property.
B. a high-caliber science student graduates from a ordinary high school.
C. the small alterations should be done immediately.
D. the society's help to inner-city schools is inadequate.
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