单选题:There' s no light on--they__________ be at home. 题目分类:英语 题目类型:单选题 查看权限:VIP 题目内容: There' s no light on--they__________ be at home. A.can't B.mustn't C.needn't D.shouldn't 参考答案: 答案解析:
When Johnson said he had an injection in his neck each eve When Johnson said he had an injection in his neck each evening, he really mean 分类:英语 题型:单选题 查看答案
What do we know about people sleeping in the space shttle? What do we know about people sleeping in the space shttle?A.They sleep while li 分类:英语 题型:单选题 查看答案
--Is Tom coming with us?--He can't--he__________ for his exa --Is Tom coming with us?--He can't--he__________ for his exams.A.prepares B.is 分类:英语 题型:单选题 查看答案
电路如图1-4-4所示,电流i1=3+5sinωtA.,i2=3sinωt-2sin3ωtA,则1Ω电阻两端的电压uR的 电路如图1-4-4所示,电流i1=3+5sinωtA.,i2=3sinωt-2sin3ωtA,则1Ω电阻两端的电压uR的有效值为( )V。 图1-4-4习题8 分类:英语 题型:单选题 查看答案