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【单选题】
在多人协作开发应用,全局对象中声明了一个属性如下: var a='str1' 如果第三方开发的JavaScript库的,也在全局变量对象中也声明了一个属性a='str2',两者一同使用时,a的值是()A.
str1
B.
str2
C.
不确定，与加载的顺序有关
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举一反三
【单选题】Costs for regulation of business actually are a hidden tax severely reducing the competitiveness of domestic businesses ______ when they face an increasingly global marketplace.
A.
at times
B.
at present
C.
at once
D.
at a time
【单选题】Costs for regulation of business actually are a hidden tax severely reducing the competitive ness of domestic businesses ______ when they face an increasingly global marketplace.
A.
on occasions
B.
at a time
C.
under the circumstances
D.
at once
【单选题】Hidden hotel costs can be a source of frustration to the frugal traveler.
A.
careful
B.
clever
C.
ignorant
D.
economical
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