报告显示,义务教育阶段,交给学校杂费(含教辅资料、校服费等)、食宿费、学习用品费,这三项基础性费用的总和,约占子女教育总支出的()。 ["A.16.90%","B.17.90%","C.18.90%","D.19.90%"]
华为DRRU268e的供电方式是() ["220VAC","380VAC","-48VDC","48VDC"]
国家助学贷款,每个学生每学年的贷款金额最高不超过()。 ["6000元","7000元","8000元","9000元"]
华为DRRU268e的接收灵敏度是()dbm ["-110","-114","-118","-112"]
华为DRRU268e额定输出功率是() ["2W","4W","5W","12W"]
蛋白质污染物