题目

—My dad bought me a new MP4, but I don't know ____.--Let's read the instructions.A.what to useB.which one to use C.how to use it D.when to use it 答案：C （2016春•临夏州校级期末）我国在黄土高原生态环境建设中，采取措施不合理的是（　　）A．植树种草，绿化荒山B．大力发展畜牧业C．筑梯田，修堤坝D．退耕还林，精耕细作，发展生态农业