题目

听下面一段较长对话，回答以下小题。【1】What is the man going to do for his holiday?A.Go boating B.Go for picnic. C.Go to the seashore.【2】Why does the man suggest the woman watching the whales?A.Whales are near the coast. B.The weather is perfect. C.The time is suitable.【3】What does the man tell the woman to do before watching whales?A.Buy a ship. B.Book in advance. C.Practise swimming.【4】Why is the woman worried about whale watching?A.It is very demanding. B.It is a little costly. C.It is a bit risky.下列方程后面所给出的数，哪些是方程的解？ ，±1，±2；