【单选题】I can't remember _______ I put the book, and I need it for my homework now. [ ]
【单选题】要研究导体的电阻与导体的材料是否相关,我们必须要控制的因素有( )
【简答题】旅游公司为3个旅游团提供4条旅游线路,每个旅游团任选其中一条. (1)求3个旅游团选择3条不同的线路的 概率 (2)求选择甲线路旅游团数的期望.
【单选题】One way in many big cities is the subway.
【单选题】One way to travel in many big cities is to take the subway.
【单选题】I can't remember her name. It's on the ______ of my tongue.
【单选题】I can't remember a single time that my parents explicitly told me I love you.
【单选题】I can't remember my password! But I _____ written it in my notebook as sometimes I do that.