题目

等于(   )A.               B.                 C.               D.1 答案：分析：由于“和的极限等于极限的和”只能用于有限多项相加,因此,对于本题应先求和化为有限项的算式,再运用极限的运算法则求极限.解析：∵∴原式=答案：B The girl has been lonely since her mother ______________.A. die B. died C. deathD. dead