弯曲程度偏大的钻具进鼠洞时应注意什么？
参考答案：分工明确，用撬杠调整钻具位置，严禁用手触摸钻具。
In their efforts to persuade us to buy that product,shopkeepers have made a close study of human
nature and have __________ all our little weaknesses. [ ]
A. divided
B. arranged
C. classified
D. separated
( )是城市社区建设的重点发展项目。
A．社区保障
B．社区服务
C．社区建设
D．社区福利
E．社区基础设施
