概括《钢铁是怎样炼成的》中保尔的人物形象。
参考答案：有无产阶级的觉悟，坚强、勇敢、正直、友爱、聪明，有点火爆，爱学习，热爱祖国。
Experiment after experiment, they tried to acquire the _____evidence and ______ data needed to solve the technical problem. [ ]
A. concise; accurate
B. precise; concise
C. adequate; accurate
D. enough; concrete
企业向我行申请出口退税账户托管贷款，必须同时具备哪些基本条件？
