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The Building of the PyramidsThe oldest stone buildings in the world are the pyramids.【46】
2019-05-21
Smart WindowWindows not only let light in to cut down an electricity use for lighting, but
2019-05-21
Electromagnetic EnergyWhite light seems to be a combination of all colors. The energy that
2019-05-21
Irish Dolphins May Have a Unique DialectIrish scientists monitoring dolphins living in a r
2019-05-21
Many scientists have been probing psychological problems.A.solvingB.exploringC.settlingD.h
2019-05-21
Henry cannot resist the lure of drugs.A.abuseB.flavorC.temptationD.consumption
2019-05-21