The nurse provides fluid replacement for a client with burns on 35% of his body. It has been 12 hours since the burns occurred. His blood pressure is 85/60 mmHg. His pulse is 124 beats/minute. Urine output was 25 mL during the past hour. What orders should the nurse expect to receive from the physician ？（）

A．Maintain IV fluids at the present rate, and continue to reassess vital signs and urine output hourly.

B．Increase the IV rate, and continue to reassess vital signs and urine output hourly.

C．Decrease the IV rate, and continue to reassess vital signs and urine output hourly.

D．Administer a vasoconstrictor, and reassess vital signs and urine output hourly.

由生活经验知道，在马路上骑自行车时，速度越大，感觉空气的阻力越大，小明同学根据这个经验提出了一个问题：空气阻力与速度有什么关系？

针对这个问题，他提出了如下猜想：

（1）也许空气阻力大小与速度大小成正比；

（2）也许空气阻力大小与速度平方成正比．

究竟哪一个猜想正确呢？他设计后进行实验，并获得如下数据：

                                    同一个物体

（1）小明得出的结论是______．

（2）回忆一下骑自行车减小阻力的场景，提出空气阻力还可能与什么有关？

答：______

（3）小明是按照怎样的思维程序进行探究活动的？

答：______、→______、→______、→______．