简介:摘要本论文探讨了农村小学语文教育教学过程中班级管理的“管法”问题,目的在于提高班主任老师的管理效率,同时促进“教法”和“学法”的改进,达到学生、老师都要减负提质的效果。
简介:【原文】Butlet'sstepbackforasecondhereandexplainwhatgravitationalwavesactuallyare.AccordingtoEinstein'stheory,thefabricofspace-timecanbecomecurvedbyanythingmassiveintheUniverse.Whencataclysmiceventshappen,suchasblackholesmergingorstarsex-ploding,thesecurvescanrippleoutelsewhereasgravitationalwaves,justlikeifsomeonehaddroppedastoneinapond.BythetimethoseripplesgettousonEarth,they'retiny(aroundabillionthofthediam-eterofanatom),whichiswhyscientistshavestruggledforsomanyyearstofindthem.--NewYorkTimes.