【单选题】某考生答两道计算题,若答对第一题的概率是 ,答对第二题的概率是 ,则恰好答对一题的概率是______。
【单选题】在Windows系统中设置默认路由的作用是()
【简答题】选词并用其适当形式填空。 work, close, look, have, teacher, pen, eat, China, play, climb 1. This is our ________ desk. Ours are over there. 2. Bill has three ________. One is new and the other two are old. 3. His ...
【简答题】My class will put on a short play in English at the end of the year. Yesterday our English teacher gave us copies of the play. “Choose a character in the play whom you’d like to be, ”she told us. “Thi...
【多选题】以下几点是Internrt的主要功能的有( )
【单选题】北京市位于116°E、40°N,处在五带中的 [ ]
【单选题】某考生答两道计算题,若答对第一题的概率是1/3, 答对第二题的概率是1/5, 则恰好答对一题的概率是( )。
【单选题】某考生答两道计算题,若答对第一题的概率是1/3,答对第二题的概论为1/5,则恰好答对一题的概率是