2005年10月12日,我国成功发射了“神州”六号载人飞船。飞船入轨后,环绕地球飞行77圈,历时115个小时于10月17日安全返回地面。在2000年1月26日,我国还成功发射了一颗地球同步卫星,定点在东经98°赤道上空。假设飞船和卫星都做圆周运动,那么飞船和卫星在各自轨道上运行时 ( )
—________ was Jim during his holiday? —He was in Beijing. A.Where B.How C.What
—________was your holiday? —It was fantastic. A.Where B.How C.What
You ________stay in bed and take some medicine. A.has to B.have to C.need
He is waiting outside the ________office. A.doctor B.doctors C.doctor's
They want ________her with her lessons. A.help B.to help C.helping