Đáp án:
Giải thích các bước giải:
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9,5m=....950.cm
10,7dm=...1070...mm
2,56km=....2560.m
1,005km=.1005...m
90,03m=..9003...cm
54,5dm=5450....mm
45,6dam²=5460......m²
4,05hm²=....405.m²
9,1km²=.91000...m²
Giải thích các bước :
Cho `m`, `n``>``0`, chứng minh rằng: $\frac{a^2}{m}$`=`$\frac{b^2}{n}$ $\geq$ $\frac{(a+b)^2}{m+n}$
biểu cảm một đoạn văn về một kỉ niệm của em với cây Phượng từ 3-4 câu ko sơ sài,k chép mạng=câu trlhn
Cho dãy số 5,11,17,23,29,...,2015 .Tính tổng các số hạng của dãy số trên
Nêu lợi ích của ứng dụng công nghệ cấy ghép tế bào (phôi) đối với cuộc sống con người?
Read the article and tick () A, B, or C. The woman who can remember every day of her life As part of our series on extraordinary people, this week we find out about Rita Howard, a woman with a very unusual talent. What was the weather like yesterday? What were you thinking about when you woke up this morning? If someone asked you these questions, you probably wouldn’t find it too hard to answer. But how about remembering the same information for this date last year, or even ten years ago? Most of us find it easy to remember what happened on the most important days of our lives, but soon forget the little details of the other days, weeks, months and years. We often imagine that, without this regular ‘forgetting’, our brains would be too crowded with memories and thoughts. For Rita Howard, however, it’s as easy to remember a day thirty years ago as it is to tell us about yesterday. Rita can choose any date from her 68 years and say where she was, what she was doing, and what day of the week it was. For years, she had no idea that this amazing memory was anything special. She was a hard-working student who always did well at school. Then later she became a historian, a job where she had many opportunities to use her ability to memorize all the facts she’d ever learned. Even so, it was only six years ago, when she was in a research project, that scientists actually told Rita she had hyperthymesia – an unusually good memory of her own experiences. Only around 20 people worldwide have the condition. ‘People began to imagine that I knew everything,’ says Rita. ‘Whereas, of course, I only know everything about my own life!’ Another common idea is that Rita has far more memories than everyone else. ‘In fact, we all have a similar number,’ she comments. ‘I’m just far better at finding and using mine than other people.’ As Rita reached retirement age, she wondered if her memory would get worse. Three years later, however, it’s just as good as ever. ‘Will that always be the case?’ she asks. ‘Who knows? I know all about the past, not the future!’ Example: This is the first article in the series. A True B False C Doesn’t say 1 Most people don’t find it difficult to remember recent events. A True B False C Doesn’t say 2 People find it easier to remember their own lives than world events. A True B False C Doesn’t say 3 We generally think that it’s useful to forget small things. A True B False C Doesn’t say 4 Rita Howard is best at remembering things which happened a long time ago. A True B False C Doesn’t say 5 When she was young, Rita thought everyone had an excellent memory. A True B False C Doesn’t say 6 People noticed her ability to memorize information when she was at school. A True B False C Doesn’t say 7 People expect Rita to know about things that she hasn’t experienced. A True B False C Doesn’t say 8 Everyone’s brain has as many memories as Rita’s. A True B False C Doesn’t say 9 Rita is working as a historian. A True B False C Doesn’t say 10 Age hasn’t changed Rita’s abilities. A True B False C Doesn’t say
em có nhận xét gì về đất nước Trung Quốc dưới thời Nguyên
1 vật có thể tích 159 cm khối ,thả chìm hoàn toàn vào nc . Tính lực đẩy Ác-si-mét áp dụng lên vật biết : d của nc =10 ^4 ( N/m khối) CẦU MONG GIÚP TUI VS Ạ!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
lập dàn ý văn tả nụ cười của mẹ
1.Chính sách thuộc địa của thực dân ở phương Tây ở Đông Nam Á có những điểm nào nổi bật? 2.Sự đoàn kết của 3 nước Đông Dương được biểu hiện như thế nào? ( Các bạn nào cảm thấy mình có câu trả lời hay và đũng thì trả lười giúp mình còn bạn nào cảm thấy câu trả lời mình chưa đầy đủ hay chưa đúng thì hãy nhường quyền trả lời cho những bạn khác ạ , e cám ơn ạ)
Một dung dịch có hòa tan 1,58 gam KMnO4 tác dụng với dung dịch hỗn hợp có hòa tan 9,12 gam FeSO4 và 9,8 gam H2SO4 . Hãy tính số gam các chất có trong dung dịch sau phản ứng .
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