原则上，个人代理办理金燕借记卡的数量不得超过（）张。
A.2
B.3
C.4
D.5
参考答案：B
用2、5、3、0组成四位数，最大的是______，最小的是______，它们的和是______．
About ________ of the workers in that steel factory_______ young people.
A．third-fifths ; are
B．three-fifths ; are
C．three-fives ; is
D．three-fifth ; is
