蝌蚪生活在水中用鳃呼吸,也可以用肺呼吸,所以它是两栖动物。[ ]
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Keep up a good state of mind even if you ______ fail plenty of times.
A.should
B.will
C.must
D.need
能将程序补充完整的选项是( )。 class Person { private int a; public int change(int m){return m;) } public class Teacher extends Person { public int b; public static void main(String arg[]) { Person p=new Person(); Teacher t=new Teacher(); int i; } }
A.i=mB.i=bC.i=P.aD.i=P.change(50)