【简答题】从甲地到丙地,要从甲地先乘火车到乙地,再于次日从乙地乘汽车到丙地.一天中,火车有3班,汽车有2班,那么两天中,从甲地到丙地共有_______种不同的走法.
【简答题】阅读并解答 看下面的问题: 从甲地到乙地,可以乘火车,也可以乘汽车.一天中,火车有3班,汽车有2班.那么一天中,乘坐这些交通工具从甲地到乙地共有多少种不同的走法? 因为一天中乘火车有3种走法,乘汽车有2种走法,每一种走法都可以从甲地到乙地,所以共有3+2=5种不同的走法. 一般地,有如下原理: 分类计数原理:完成一件事,在第1类办法中有m 1 种不同的方法,在第2类办法中有m 2 种不同的方法…在...
【单选题】“旧唯物主义是半截子的唯物主义”,这是指
【单选题】The question 'How do you feel?' seems to be correct and suitable when asked of ______.
A.
a man working at his desk
B.
a person having lost a close friend
C.
a friend who has fallen ill
D.
a stranger who looks somewhat worried
【单选题】从甲地到乙地,要从甲地先乘轮船到丙地,再于次日从丙地乘汽车到乙地。一天中,火车有3班,汽车有6班,那么两天中,从甲地到乙地共有________种不同的走法。
【简答题】How do you feel when you get up in the morning? Happy and active or tired and weak? Do you often wake up with a headache(头痛)? Well, if the answer is yes, take Dr. Talbot’s advice and start feeling bet...
【单选题】-How do you feel when you watch the national flag go up? -It makes me very proud. [ ]
【单选题】“旧唯物主义是半截子的唯物主义”,这是因为旧唯物主义( )
【简答题】How do you feel when you have to make a speech in front of class? What about when you go to a birthday party? Do you get really shy? Shyness means feeling nervous or afraid when you’re around other pe...