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多项选择题
A.Math.ceil(7.25)===7
B.Math.ceil(7.25)===8
C.Math.floor(7.25)===7
D.Math.floor(7.25)===8
多项选择题
A.vararr=newArray(1:"George",2:"John",3:"Thomas")
B.vararr=newArray("George","John","Thomas")
C.vararr=newArray:1=("George")2=("John")3=("Thomas")
D.vararr=["George","John","Thomas"]
单项选择题
A.typeofarr
B.arrinstanceofArray
C.arr.__proto__.constructor===Array
D.Object.prototype.toString.call(arr)===’[objectArray]’
多项选择题
A.function=myFunction(){}
B.functionmyFunction(){}
C.myFunction(){}
D.varmyFunction=function(){}