单项选择题
A.Promise {[[PromiseStatus]]: "resolved", [[PromiseValue]]: "hello async"} ； B.hello async C.hello asyncPromise {[[PromiseStatus]]: "resolved", [[PromiseValue]]: undefined} D.报错
async function print(){ return 1;}print().then(e => con...
单项选择题async function print(){ return 1;}print().then(e => console.log(e)); 输出（）
A.1 B.报错 C.0 D.undefined
async function t(){ var a = new Promise( function (reso...
单项选择题async function t(){ var a = new Promise( function (resolve, reject) { console.log(1); resolve(9); console.log(2); }) var b = new Promise( function (resolve, reject) { console.log(3); resolve(8); console.log(4); }) console.log(5); b=await b; a=await a; console.log(b); console.log(a); console.log(6);}t();console.log(7);//代码打印结果是什么？（）
A.1 2 3 4 5 7 8 6 9 B.1 2 3 4 5 7 8 9 6 C.1 2 3 5 4 7 8 9 6 D.1 2 3 4 5 6 7 8 9 E.9 8 7 6 5 4 3 2 1
await语句后面的Promise对象变为reject状态，那么await前面有没有return执行效果是一样...
判断题await语句后面的Promise对象变为reject状态，那么await前面有没有return执行效果是一样的。
