【单选题】298K 时氨水的 K b Ɵ =1.8×10 -5 ,溶液中 [OH - ]= 2.40×10 -3 mol·L -1 ,则氨水的浓度 (mol·L -1 ) 是 ( )
【单选题】A small plane crashed into a hillside five miles east of the city, ________ all four people on board.
【单选题】.A small plane crashed into a hillside five miles to the east of the city, _____ all on board.
【单选题】A small plane crashed into a hillside five miles east of the city, _________ all the four people on board.
【单选题】The hospital is _____ five miles from the station. [ ]
【单选题】I think Class Five ________ likely to win in the match because Class Five ________ all basketball lovers. [ ]
【单选题】A small plane crashed into a hillside five miles east of the city, ________ all four people on board.
【判断题】古代东西方文明发祥地主要有古代中国、印度、埃及、两河流域、古希腊以及古罗马。
【简答题】Five miles ______ (seem)to be a long way to an old lady of her age.