Interrogativesconvey a strong and emphatic meaning, and are commonly seen in ads.
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一个mxn的数组包含______行、_______列、________个元素。
数组a1的4个元素名字分别是______、_______、_________和_________。
已知int[][] a= {{1,2},{3,4,5,6},{7,8,9}},a.length()=_________,a[0].length()=__________, a[1].length()=__________,a[2].length()=__________,a[3].length()=__________。