He began to __________ becauseevery means _______ tried already. A. loseheart has been B. lose heart had been C. losehis heart was D. lose his heart had
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【单选题】设有程序段: #define N 3 #define M N+2 float a[M][N]; 则数组a的元素个数和最后一个元素分别为( ).