九点半了,你该睡觉了.用英语怎么说

Today,the weather is fine,I and my dad got up early,meet to climb the mountain.We start at 9:30 to buy tickets,after began to climb the mountain.On our way we saw many very special scenery.More and more,people also steep mountain and exhausting,but along the way we BuPaLei far,finally climbed up the mountain.Mountains look beautiful scenery,breathing the fresh air,although tired and heat,but I feel very happy.I at the top of the hill,playing with a camera,dad took many pictures.As they were coming down the mountain,I told dad said,climbing is a meaningful activity that can exercise can broaden our horizons,later must DORA daddy,daddy delighted.Today,I'm very happy
Today's found:life is exercise,between the family to go outing frequently a significance.
My plan:my dad is very busy working.Have the opportunity to want to go out to play with dad,my father always work with the reason evade.Due to work too busy,dad lack of exercise.Just this season I have a holiday at home,I took my dad went climbing exercises,papa speak a lot of exercise benefits,father finally agreed.I hope that through this mountain climbing,can let dad understand the importance of exercising,also hope we can play of very happy

一、没看出您要问什么,可能是在哪里看到的一片文章或报道吧,仅根据这样的只言片语不好做出判断；
二、DNA检测有很多种方法,不知道文章中提到的是哪些种方法,有些方法已经过时了,很多新的技术的出现很大程度的提高了检测的精确度,但无论是那一种方法检测,都不可能以一次实验或任意一家单位或公司的结果作为判定标准.科学实验最基本的就是要有重复性,以降低或排除操作者带来的实验误差.

要合理科学地安排课外时间,劳逸结合,如果休息时间不充足,也很难学好,会学才会学会,相信我的没错.有助于你的话给个好评

(You) have to go to sleep before half past nine.
不能超过九点半睡觉

三种表达方式都应该是正确的 但是第三种表达方式并不常用 建议使用前两种比较保险

when do you usually go to bed?At half past nine.

看一下图.

Now it's nine o 'clock. Can't sleep more than half past nine

at six o'clock也可以直接说at six
12.at three fifteen,15还可以用quarter表示,过就是past,那就是quarter past three
13.如上所述,five past eight
14.按照上面套,就是thirty past nine,但一般不这样说,几点半是用half来表示,那就是half past nine
15.像这种离整点相差不到半小时,基本上习惯用差多少分到那个整点,差多少分是用 to,所以是twenty-five to eleven
16.ten to six
17.five to
PS.在哪个时间是用at

倡议熄灯,不可能强制停电的.
而且,只是熄灯,不是让你把所有电器都关掉……

90+30/2=105°
钟面上九点半时,时针和分针成（105 ）度角.

证明：∵OG⊥OD
∴∠2+∠AOF=90
∵∠2=35
∴∠AOF=55
∵∠1=55
∴∠AOF=∠1=55
∴AB∥CD(同位角相等,两条直线平行）

nine o'clock; half past four; five to seven; seven o'clock; half past nine; one o'clock

清晨，当第一束阳光射入我的房间，我睁开眼睛，呼吸着清晨特有的清新的新鲜空气，啊！又是新的一天，又是新的一切，昨天已经永远成为过去，新的一天已经来到我的面前，把头伸出窗外，环顾四周，薄雾笼罩着一切，隐隐约约，明灭可见。鸟儿在枝头轻轻的唱着，歌唱这美好的世界，此时我看见一个多么宁静、美好的世界，霜与雾就是清晨的一切。 渐渐地，阳光已经穿破云层，扶摸大地，刚才的薄雾已经消失不见，奔跑的汽车打破了宁静，...

five o'clock
half past seven
a quarter past ten
half past nine / nine thirty
a quarter to eleven
a quarter to two

扰乱 哀鸣 狩猎 哀号 喧嚣 喑哑 沉寂 静谧 篡夺 劫掠 酷爱 弱肉强食 隐隐约约 窸窣作响 连续不断 夜色苍茫 更胜一筹 惊慌失措 开膛破肚 津津有味 断肢残腿 毫不犹豫

答案是54时

Jordan was born in 1936 in New York,as a child are not tall Buaishuohua.However,he was known for the beginning of the University of North Carolina,he's acrobatic style of basketball into the campaign to force the pace and again and again into the basket.As a result of a strong and well-known dunk,the nickname "Air Jordan." After graduating from the University of Jordan,Chicago Bulls was selected to lead the team access to six NBA championships in a match set a personal record of 69 points.In April 2003,the 40-year-old Michael Jordan retired.Now he has his own sports clu

1题=7.2÷（1.25x8)=7.2÷10=0.72
2题=136x(1-0.8)-136÷0.2=136x(0.2-5)=-652.8
3题=17/51+17/68+（2x17)/51=1+17/68=1+1/4=5/4
4题=2000X7+1+2+3+4+5+6=14000+21=14021

I go to bed at half past nine
I go to bed at nine thirty.
I go to sleep at half past nine.呼呼,

My Day
I woke up at 8:00a.m. 我八点起床.
I brushed my teeth and cleaned my face. 刷我的牙洗我的脸 .
At 8:15a.m. I had my breakfast. 八点十五吃早饭.
I played table tennis at half past nine. 九点半去打乒乓球.
And I went home at ten thirty. 十点半回家.
I had lunch at twelve noon. 十二点吃午饭.
Then I did my homework at half past twelve. 十二点半写作业.
And I played with my friends at 2:00 p.m. 两点和朋友玩.
At 6:00p.m. I had dinner at home . 六点吃晚饭.
And I slept at 9:00p.m. 九点睡觉.
This was my day...a happy day. 这就是我的一天我很开心.

On Saturday morning,I did my homework.In the afternoon,I visited my classmates.In the evening,I walk with my mother.At 9:30,we went bavk home.It was really a happy day.

九点半 half past nine
二点五十五 five to three
十一点四十五quarter to twelve
五点五十五分five to six
1956年in 1956 (ninteen fifty-six)
还有kilo 等表示千的数字该怎么用
看做一个前缀
there will be 跟there is going to be 的区别?
will表意愿,be going to 表有打算,有趋势要发生什么.

45/(1-1/12)-30=45*12/11-30=49又1/11-30=19又1/11分
60/（1-1/12）=60*12/11=65又5/11分
答：现在是九点半,过19又1/11分钟后时针与分针第一次重合；
重合后,过65又5/11分第二次重合.

The train time is nine thirty,the arrival time is eleven thirty

105
九点时,夹角为90度
九点半,分针顺时针走了180度.时针走了二分之一大格,钟面上有12个大格,每个为30度.所以,时针顺时针走了15度
90+180-15=255度,255度大于平角所以360-255=105度
所以夹角是105度

不用那么刻苦,中午还是要休息的,注重工作效率,上课的时候要认真听讲,课下记得再看看,真正理解了所学内容,写作业自然就快了,希望对你有用

第②处：在“特别行动”后加“的活动”.第④处：将“工作”改为“医院”

Our total 6 personal,Saturday morning at 8:30 train station square,drive,set at 9:30 at half past eleven,Sunday afternoon to come back.Bring your camping equipment:tents,sleeping bags,coats,water,food,etc.

a quarter past 8,half past 9,a quarter to 11,5 to 12

nine fifteen a quarter past nine
nine thirty half past nine
nine fifty ten to ten
ten forty twenty to eleven
eleven twenty-five twenty-tive past eleven

晚上子（鼠）时是十一到一点,以十二点为正点；丑（牛）时是一点到三点,以两点为正点；寅（虎）时是三点到五点,以四点为正点；卯（兔）时是五点到七点,以六点为正点；辰（龙）时是七点到九点,以八点为正点；巳（蛇）时是九点到十一点,以十点为正点；午（马）时是十一点到一点,以十二点为正点；未（羊）时是一点到三点,以两点为正点；申（猴）时是三点到五点,以四点为正点；酉（鸡）时是五点到七点,以六点为正点；戌（狗）时是七点到九点,以八点为正点；亥（猪）时是九点到十一点,以十点为正点.
因此晚上八点是戌时正点.
晚上九点半是【亥时】人定,又名定昏等定,又名定昏等：此时夜色已深,人们也已经停止活动,安歇睡眠了.人定也就是人静.（21时至23时）. 十二时辰制.西周时就已使用.汉代命名为夜半、鸡鸣、平旦、日出、食时、隅中、日中、日昳、晡时、日入、黄昏、人定.又用十二地支来表示,以夜半二十三点至一点为子时,一至三点为丑时,三至五点为寅时,依次递推.

1.你几点钟吃晚饭?what time do you have supper
2.让我们休息一下吧!let's have a rest.
3.你下午上几节课?how many classes do you have this afternoon?
4.我大约九点半睡觉.I go to sleep at about half past nine.

这句话带上答案的肯定句是her father ask her to go home before 十点
问题中已经有before了,所以问的是几点之前,提问点在when,所以when = 十点
选

It was a fine day.My husband and I prepared for a picnic.In a short time,we drove into the country.We found a quiet spot and then unpacked our hampers.The food smelled good and we were very excited.
Suddenly,we found that a few wasps were flying around us.The worse thing is,the number of wasps was increasing.We made our best efforts to drive them away,but the efforts had no effect.We were very anxious when we saw a wasp nest in a tree nearby.So we seized our things,returned to the car pursued by wasps and drove away as quickly as possible."What a terrible day!" my husband said.

You should sleep before nine thirty

Do your things yourself. Get up at six and make your bad clean. You must get home before six every night. You should get into bad before 9:30 every night. During your school time you are not allowed to watch TV. You should clean your room at weekends.

1他的黑发his black hair
2两只大眼睛 two big eyes
3照看他们 look after them
4 在9点钟 at 9 o'clock
5 在五班 in class five
6 左右转动 turn from the right to the left ;turn from side to side
7九点半 (at) nine- thirty;half past nine
8在我的床上 in my bed
9在汤姆的书包里 in Tom' bag
10在我的图片中 in my picture（s）
祝你进步,时时开心!O(∩_∩)O~~

先假设可能
设x年后是母亲的2/3
则 12+x = (36+x) * 2/3
12+x = 24 + 2X/3
X/3 = 12
X = 36
所以是36年后 小杰年龄是母亲的2/3.

n>=2
因为1-S(n)=a(n-1)-a(n)
所以S(n)=a(n)-a(n-1)+1 (1)
S(n-1)=a(n-1)-a(n-2)+1 (2)
(1)-(2),得
S(n)-S(n-1)=a(n)-2a(n-1)+a(n-2)
得a(n)=a(n)-2a(n-1)+a(n-2)
得a(n-1)/a(n-2)=1/2
从而得出,数列相邻两项比值为定值,从而证明{a(n)}为等比数列.

It is alredy half past ten!

see
visit

120° 90° 90° 180°

I go to bed at half past nine

大象 英国

dafferent应该是楼主的笔误.different.
1942年那个黑暗的冬日是那么寒冷.但是从那个时候起,每一天每小时都是这样了（都没有什么不同了）.我和其它数以万计的犹太人一起从家里被带到这儿来.我明天还能活着吗?