【单选题】The young man didn't know _____ to get married or to wait.
【简答题】As I was thinking about this later on, I wondered ________ the young man didn't just perform this act of kindness himself.
【判断题】The writer didn't think the young man looked familiar.
【单选题】若已定义 :int x,t, 能正确判断变量 x 、 t 中的值同时为正或者同时 为负的逻辑表达式是( )。
B.
(x>0 && t>0)||(x<0 &&t<0)
C.
(x>0 && t>0)&&(x<0 && t<0)
D.
(x>0ll t>0)&&(x<0||t<0)