计算题：已知高炉炉容350m3（V）求风口冷却水最高水速（H）m.s-1。（附公式）

This morning I went to a nearby food store to buy some breads. After the man in the store packing the bread in a small bag for me, I began to walk home with bag in my hand. On the way I met my next-door neighbor, Miss Wang, that was walking her dog .We greeted with each other and begin to talk about the weather. As we were talking, his dog came up at the bag in my hand though the bread gave off a delicious smell. As a result, some of the bread fell to the ground or the dog began to enjoy it. Five minutes late, I was back at the store to buy bread again.

位于珠江三角洲的两个经济特区是_______________、_______________。

有关肘管综合征，下列不正确的是（）

A.肘管综合征是尺神经的慢性损伤

B.肘管综合征的最常见病因是肘外翻

C.手背尺侧、小鱼际、小指及环指尺侧感觉麻木常为首发症状

D.治疗方法为手术治疗

E.已萎缩的手部小肌肉术后可较快恢复，而手部感觉可缓慢恢复正常

马克思和恩格斯曾说过：当英国进行了工业革命，法国进行了政治革命的时候，德国进行的是、也只能是思想革命。以下解读正确的是（）

A.马、恩的判断体现了对德国革命的失望心情

B.不同类型的革命是由不同的民族性格决定的

C.三种类型的革命极大地塑造了近代西方文明

D.革命由经济、政治再到思想领域，符合唯物史观

我们使用的照明电压为220V，这个值是交流电的（）。

A、最大值

B、有效值

C、恒定值