一小时多少毫秒

学英语是长期的、坚持不懈的,是日久积累的,是一辈子的事情,不是一朝一夕就能学会的.
你说的一小时复习英语,只有把你学习的重点单词默写几遍,其他方法没有的.

这个问题涉及到用电器的功率因数.如果是纯电阻负载（例如白炽灯,电炉丝等）,功率因数等于1,电压乘以电流就是功率.如果是洗衣机,电风扇之类电器,它们的功率因数在0.8左右,所以还要乘以0.8才是实际功率.0.2x220x0.8=35.2 w

8:30-9:30

一题：12（x+3）=15（x-3）
解得x=27
二题：x除以85-x除以90=六分之七
解得x=1785

考前一小时
昨天，老师在黑板上留了字条：明天第一节课考试，请同学们做好复习准备！（黑板上怎么留字条？用词要斟酌哦）看，现在班里的每一个同学都拿着英语课本，紧张地复习着，多么地认真呀。第一组第一张桌的张金铃口里念念有词，手也在不停地数，背完五个单词后又翻开书本，接着再背五个。黄雪美一边背单词一边看手表，看来他是临时抱佛脚啊。许振强、黄浩、黄育腾、钟远森他们四个用问答形式进行复习，个个都紧锁着眉头，想着这个单词怎么写，那个单词怎么写。也有几个同学拿着课本飞快地跑向花园，说这里太吵。那几个差生，平时说天不怕、地不怕，这会儿，也在紧张的复习呢。班长的嘴一动不动地，其实在默写单词。再看看外面刚扫完保洁区的同学，更是像长了“飞毛腿”似的，奔向教室，把扫把一扔，什么都不管了，只想快点复习英语单词。那几个自称“城市灌篮高手”的男生，已经把“生死”置之度外了，仍在逍遥自在地打着篮球。
上课铃终于响了，同学们都把书拿走了，气氛变得更加严肃了，更加紧张了……（“把书拿走了”一句表意不明，“上课铃”也应该改成“考试的铃声”）

With the development of information techno1ogy and reduced price of communication products, the mobi1e phone has become a necessity for most people.
Obviously, it shortens the distance between people and makes our life more convenient. Thanks to it, it’s easy for us to contact or be contacted by others anytime and anywhere. We will never miss any important meetings,great deals or admirable opportunities. But,have you noticed sometimes the mobile phone also brings embarrassment to us? It’s not rare to see someone pressing the mobile phone to his ear and shouting 1oud1y in public as if there were no one else present. And I’m sure each one has had such an experience that the mobi1e phone ring continuous1y on a formal occasion. Perhaps these People have many 1ife-and-death reasons to keep the phone working at all times, but it interrupts people around them who have to hear what they don’t care when they want to concentrate on what they’re doing.
So if you are one of them, please shut off your cell phone in public, especially on a quiet and serious occasion. It’s a respect for both others and yourself

1.It looks round.
2.No,it hasn't./No,it doesn't.
3.Two.
4.Yes,it can.
5.Wake up,wake up,it's time to get up!
6.It is a clock.

in an hour
every month

The power will be out for about an hou