【单选题】在混凝土中掺入( )后,对其密实性和抗渗性的提高没有作用。
【单选题】定义 JavaScript 数组的正确方法是?
A.
var txt = new Array="George","John","Thomas"
B.
var txt = new Array(1:"George",2:"John",3:"Thom
C.
var txt = new Array("George","John","Thomas")
D.
var txt = new Array:1=("George")2=("John")3=("Thomas")
【单选题】定义JavaScript数组的正确方法是?
A.
var txt = new Array="tim","kim","jim"
B.
var txt = newArray(1:"tim",2:"kim",3:"jim").
C.
vartxt = new Array("tim","kim","jim").
D.
var txt = newArray:1=("tim").2=("kim").3=("jim").
【单选题】在下列功能中,哪一项最好地描述了OSI(开放系统互连)参考模型的数据链路层
【单选题】定义JavaScript数组的正确方法是?
A.
var txt = new Array="tim","kim","jim"
B.
var txt = new Array("tim","kim","jim")
C.
var txt = new Array(1:"tim",2:"kim",3:"jim")
D.
var txt = new Array:1=("tim")2=("kim")3=("jim")
【单选题】下列功能中,( )最好地描述了OSI参考模型中数据链路层的特点。
【单选题】在下列功能中,______最好地描述了OSI(开放系统互连)参考模型的数据链路层。