题型:填空题 Many students don't want themselves to _______ doing _______ homework.A.keep busy; too much B.be kept busying; much tooC.be kept busy; too muchD.being kept busy; too much 查看答案
题型:填空题 220文件对两率的要求是()。A、中修机车“一次成功率不应低于90%B、中修机车“一次成功率不应低于60%C、小修、辅修机车“一次成功”率不应低于60%D、小修、辅修机车“一次成功”率不应低于90% 查看答案