Two people are each standing 3.0 m in front of a large plane mirror and are spaced 6.0 m apart.At what angle of incidence should one of them shine a flashlight on the mirror so that the reflected beam will strike the other?

If two people are not like each other.We always say they are different.的意思 when two people __to each other talk are talking talked要原因 Neighbours are people who help each other with the visionphone two people who are talking can see each other中with 能换成哪两个单词?visionphone (视频电话) where are the two people ______? the two women are talking to each other 对are talking to each other 提问 ---______ are those masks?---Twenty-two yuan each. The two girls are friendly to each other同义句 the two shops are beside each other同义句 two people start off to walk directly away from each other.they each walk for 4 kilometers thenturn directly to their right and walk for another 3 kilometers.how far apart are they? People are friendly to （ ）填each other 还是 others two people who love each other “who”在此作用?这句是定语从句把,但是可以直接说成two people love each other?who不要吗? there are four people in a room.for every two people are connected if:-they are friends,or-a third person is friends both of them,or -they have different friends who are friends of each other.what is probability that every pair of people in this room Now many people are crazy about these two personsNow many people ------ these two persons ------- ----- 急…在线等…短文改错 nowadays many people are using a kind of telephonesnowadays many people are using a kind of telephones called the vision phone .with it ,two people are talking can see each other ..vision phones cam be helped when you h 2.why should people not fool each other?3.What are two things that a ticket seller at a train station wants to know?4.explain how people use a landmark to be able to return to where they started from?what are two things that can serve as a landmark? There are two father and two sons.How many people at least are there? here are two mothers and two daughters,how many people at least are there?IQ