A:There are many stars in the sky.
B:There are many kites in the sky.
①队准备到郊外的山地进行越野活动,需要设计越野路线。
②美国发动伊拉克战争,给伊拉克人民带来巨大灾难,小强想找一找伊拉克位置。
③小明想去博物馆参观,博物馆离他家很远,他得想一想怎样乘车。
—Please say something about Zheng He.
—Oh! He is the Ming dynasty explorer of ______ all the Chinese are proud.
当x=____ 时,分式x2-1x+1的值为0.