题目内容

Array对象哪个属性将返回表示数组长度的数值。

A. length属性
B. getLength属性
C. size属性
D. getsize属性

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（微分公式）d()=2dx

A language which is widely adopted for communication between two speakers whose native languages are different from each other is called____?

A. a mother tongue
B. a second language
C. a lingua franca
D. an international language

How many working languages of the United Nations are there ?

A. 2
B. 3
C. 4
D. 5

Over % mails are written by English and about % broadcast is spread in Englsh.

A. 60.70
B. 70，60
C. 60，60
D. 70.70