练习Practice
动手做Get your hands on it
练习跟着课文走 —— 每节课尾都有本课的练习。这一页是全部练习的总库，想集中刷题的时候来。 每个练习都写清了它来自哪一节，卡住了就回去看那一节。Practice follows the lessons — every lesson ends with the exercises for that lesson. This page is the whole library, for when you want to drill in one sitting. Each exercise names the lesson it came from, so you can go back when you stall.
0 / 148个做对过you got right
已筛到你正在学的《Cab Booking》。想看全部就点上面的「全部」。Filtered to Cab Booking — the course you are on. Use “All” above to see everything.
练习Exercises
筛出 1 个练习（共 148 个）。Showing 1 of 148.来自From 用一个 state 管四个页面Controlling four pages with one piece of state · Cab BookingCab Booking
L1排顺序Order it把一次完整预订的六步排好Put the six steps of one full booking in order
从点「Book a Cab」到历史里出现记录，中间发生了什么？按顺序排。What happens between pressing “Book a Cab” and the record appearing in the history? Put the steps in order.
1setCurrentPage("cab-options")
2updateBookedCabDetails(cab) —— 写 Context 的两个 stateupdateBookedCabDetails(cab) — writes both states in the Context
3setCurrentPage("loading")
4Loading 的 useEffect 里 setTimeout 1000ms 到期The setTimeout of 1000ms inside the useEffect of Loading fires
5onComplete() → setCurrentPage("cab-confirmation")
6onConfirm() → setCurrentPage("home")，首页读到新的 rideHistoryonConfirm() → setCurrentPage("home"), and the home page reads the new rideHistory