题目
第7题
A.class Counter{def counter = “counter”}
B.class Counter{val counter = “counter”}
C.class Counter{var counter:String}
D.class Counter{def counter () {}}
第8题
A.class Counter{def counter = “counter”}
B.class Counter{val counter = “counter”}
C.class Counter{var counter:String}
D.class Counter{def counter () {}}
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