题目描述 单选 A. ①vector<double> v; ②continue; B. ①vector<int> v; ②continue; C. ①vector<double> v; ②break; D. ①vector<int> v; ②break; E. ①vector<double> v; ②v.push_back(a); F. ①vector<int> v; ②v.push_back(a);