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【单选题】
给定java代码如下,关于super的用法,以下描述正确的是: class C extends B{ public C(){ super(); } }A.
用来调用类B中定义的super（）方法
B.
用来调用类C中定义的super（）方法
C.
用来调用类B的无参构造方法
D.
用来调用类B中第一个出现的构造方法
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反馈参考答案：
举一反三
【简答题】教师和学生在社会道德上是()的关系。 A.上下级 B.平等 C.授受 D.相互促进
【单选题】My father _________ Beijing many times. He _________ there again last week.
A.
has been to; has gone
B.
has gone to; went
C.
has been in; has gone
D.
has been to; went
【单选题】My father _____ to America. He _____ there three months ago. [ ]
A.
went; has been
B.
has been; has gone
C.
has gone; went
D.
has went; went
【单选题】My father _________to South Hill．He______ there for 5 days．
A.
has gone：has been
B.
has been; has gone
C.
has gone；has gone
D.
has been；has been
【单选题】My father______ Australia for a year. And he enjoys staying there.
A.
has been in
B.
has been to
C.
has gone to
D.
went to
【单选题】关于SCA板的描述不正确的有()。
A.
SCA板不处理监控信息
B.
SCA可以完成OSC信道的接入和解出
C.
没有信号输入时，SCA板会上报告警
D.
SCA可以用在OLA站和OTM站
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