模塊化開(kāi)發(fā)第一單元[復(fù)制]1.Object.____________.call(obj)橫線處的腳本是（）時(shí)可以檢測(cè)出obj的類型？[單選題]*prototype__proto__prototype.toString()prototype.toString(正確答案)2.在javascript中，________變量在函數(shù)外聲明，并可從腳本的任意位置訪問(wèn)?[單選題]*局部全局(正確答案)塊級(jí)自定義3.vary=18,rs="";

if(y%4==0||y%6!=0){

rs="yes";

}else{

rs="no";

}

console.log(rs);打印結(jié)果是?[單選題]*yesno(正確答案)undefinednull4.varfn=function(f){

alert(typeoff);

varf=2;

functionf(){}

alert(typeoff);

}

fn(1);正確的彈出結(jié)果（）[單選題]*function,number(正確答案)undefined,undefinedundefined,2以上都不對(duì)5.varc=(function(a){console.log(this);returna;}).apply(0,[4,3]);

console.log(c);控制臺(tái)中兩個(gè)打印的結(jié)果分別是（）?[單選題]*4,30,4(正確答案)undefined,4undefined,06.<ulid="list">

<li>html</li>

<li>css</li>

</ul>

varnode=document.createElement("li");

node.innerHTML="<b>js</b>";

document.getElementById("list").appendChild(node);執(zhí)行以上語(yǔ)句后，DOM結(jié)構(gòu)為（）?[單選題]*<ulid="list"><li>html</li><li>css</li><li>js</li></ul><ulid="list"><li>html</li><li>css</li></ul><li><b>js</b></li><ulid="list"><li>html</li><li>css</li><li><b>js</b></li></ul>(正確答案)<ulid="list"><li><b>js</b></li><li>html</li><li>css</li></ul>7.<divid="box">hello<b>world<b></div>

document.getElement("box").lastChild.nodeName的打印結(jié)果是（

）?[單選題]*world#documentb(正確答案)#text8.vararr=['apple','orange','banner'];

console.log(arr.slice())

console.log(arr)打印結(jié)果分別是？[單選題]*['apple','orange','banner']，['apple','orange','banner'](正確答案)[]，['apple','orange','banner']['apple','orange','banner']，[]以上都不對(duì)9.varobj={},通過(guò)（）語(yǔ)句檢測(cè)obj對(duì)象類型返回結(jié)果是"[objectObject]";varobj={},通過(guò)（）語(yǔ)句檢測(cè)obj對(duì)象類型返回結(jié)果是"[objectObject]";[單選題]*Object.constructor.toString.call(obj)Object.instanceof.toString.call(obj)Ototype.toString.call(obj)(正確答案)以上都不對(duì)10.functionsuperFn(){

varx=0;

returnfunction(){

x++;

console.log(x);

}

}

vars1=superFn();

vars2=superFn();

s1();

s1();

s1();

s2();以上代碼打印結(jié)果是？[單選題]*1,2,3,1(正確答案)1,1,2,11,2,3,43,2,3,111.下列程序的輸出是：

varname='global'

varobj={

name:'obj',

sayName:function(){

console.log();

}

};

obj.sayName();

varfunc=obj.sayName;

func();[單選題]*objobjobjglobal(正確答案)globalglobalglobalobj12.varfun=1;

functionfun(a){

console.log(a);

}

fun();

以上腳本的運(yùn)行結(jié)果是（）[單選題]*1undefined程序報(bào)錯(cuò)funisnotafunction(正確答案)以上都不對(duì)13.將一個(gè)基本類型值val轉(zhuǎn)換成字符串，實(shí)現(xiàn)錯(cuò)誤的是()[單選題]*String(val)val.parsInt()(正確答案)'+valval+''14.vararray=[2,1,5,3];求array中最大值的表達(dá)式可以是？*Math.max.apply(null,array)(正確答案)Math.max(array.join())array.sort(function(x,y){returnx-y})[0]array.sort(function(x,y){returny-x})[0](正確答案)15.varmask=document.createElement("div");以下針對(duì)mask進(jìn)行的設(shè)置，沒(méi)有語(yǔ)法錯(cuò)誤的有？*mask.innerHTML("hello")mask.style.position="absolute";(正確答案)mask.background="#ccc";document.body.appendChild(mask);(正確答案)16.有字符串varstr='abc345efgabcab';去掉字符串中的a、b、c字符，形成結(jié)果：'345efg'的方法有（）?*str.substring(3,9);(正確答案)str.substring(3,8);str.substr(3,6);(正確答案)str.slice(3,9);(正確答案)17.在事件處理程序內(nèi)部，下列描述正確的是：*this始終和currentTarget相等(正確答案)this始終和target相等target和currentTarget始終相等target和currentTarget可能會(huì)相等(正確答案)18.事件對(duì)象的pageX屬性可以獲取鼠標(biāo)相對(duì)于視口的X坐標(biāo)。[單選題]*對(duì)錯(cuò)(正確答案)19.

varm={x:1,y:2};

n=m;

n={x:100,y:200};

console.log(m.x,n.x)以上腳本的執(zhí)行結(jié)果是打印100和100[單選題]*對(duì)錯(cuò)(正確答案)20.forEach可以用return語(yǔ)句或者break來(lái)退出循環(huán)。[單選題]*對(duì)錯(cuò)(正確答案)21.window.reload()方法可以用來(lái)刷新當(dāng)前頁(yè)面[單選題]*對(duì)錯(cuò)(正確答案)22.定義了全局變量g，可以用window.g的方式來(lái)存取該變量[單選題]*對(duì)(正確答案)錯(cuò)23.varsJson='{"name":"Lucy","age":20}';

varjson=eval("(+sJson+)");

console.log(typeofjson)輸出的結(jié)果是string[單選題]*對(duì)錯(cuò)(正確答案)24.instaceOf的返回值是字符串，它可以用來(lái)判斷該對(duì)象是不是一個(gè)數(shù)組[單選題]*對(duì)錯(cuò)(正確答案)25.varobj={},result="thisis";