题目

After a year at sea, 16-year-old Laura Dekker can finally say, “Mission accomplished!” Last month, she finished a daring trip around the world aboard her 38-foot boat, Guppy. Dekker, who is from the Netherlands, traveled more than 30,000 miles all by herself. She is the youngest person ever to sail around the globe alone. Dekker had wanted to lake on this challenge when she was even younger. She first tried to set sail at the age of 13, but a court in the Netherlands stopped her. They said that she was too young to make such a risky trip by herself. But Dekker insisted she had theP（m+5，m+1）在x轴上，则P点坐标是A.（-4，0）B.（4，0）C.（0，-2）D.（0，2）