用于治疗阵发性室上性心动过速的最佳药物是
A．奎尼丁
B．苯巴比妥
C．维拉帕米
D．普鲁卡因胺
E．利多卡因
参考答案：C
With a lot of tough problems _____, the pilot was still calm, cool and collective under pressure. [ ]
A. solve
B. solved
C. solving
D. to solve
资本支出预算的目的，就是要对每月应向大修基金存入多少资金作出科学合理的估计。( )
