问题
选择题
It was reported that 115 miners in the flooded mine for eight days were pulled out afive at last．
A．trapped
B．being trapped
C．were trapped
D．had trapped
答案
答案：A
考查非谓语。trap在句中作定语修饰矿工与miners构成动宾关系。”“据报道被困八天的矿工最终活着被救出来了。”
的收敛半径是2，则幂级数
的收敛半径是______．