题目: Our teacher told us again _____ to each other in the library. [ ]A. to speak B. not to speak C. don't speak 答案: 答案:B
题型:选择题 All of us were _____ by the _____ questions _____ by a six-year-old boy.A. puzzled; puzzling; rose B. puzzling; puzzled, raised C. puzzling; puzzling; risen D. puzzled; puzzling; raised 查看答案
题型:选择题 保护生物的多样性,人人有责!如果你从湘江边上捡回一只罕见的活巨龟,你会采取下列哪种最恰当的方式来对待它?( )A.卖钱B.食用C.送到动物园让专业人士饲养D.将其杀死后制成标本保存 查看答案
题型:单项选择题 相对扩展不确定度的以下表示中()是不正确的。A、100.02147g;ucrel=0.35×10-6B、100.02147(1±0.79×10-6)g;p=0.95,=11C、(100.02147g±0.79×10-6),k=2D、100.02147g;Urel=0.70×10-6,k=2 查看答案