```
// 今日头条面试题
async function async1() {
console.log('async1 start')
await async2()
console.log('async1 end')
}
async function async2() {
console.log('async2')
}
console.log('script start')
setTimeout(function () {
console.log('settimeout')
})
async1()
new Promise(function (resolve) {
console.log('promise1')
resolve()
}).then(function () {
console.log('promise2')
})
console.log('script end')
//答案：
script start
async1 start
async2
promise1
script end
async1 end
promise2
settimeout
```
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