Một đám đất hình thang có đáy 150m và đáy bé bằng 3/5 đáy lớn,chiều cao bằng 2/5 đáy lớn.Tính diện tích đám đất hình thang đó?

hãy làm một bài văn về dream house

I, Rewrite the sentences do not change the meaning: 1, If we have a good diet, lead an active life, and get enough sleep then we should stay healthy. => Unless __________________________________________________________________ 2, Charles Lindbergh became famous after his nonstop solo flight from New York to Paris in 1927. He had previously worked as an airmail pilot. (RELATIVE CLAUSE) => Charles Lindbergh, ___________________________________________________________ 3, Current fresh fruit consumption trends suggest that this perishable price hike is hurting health. => If we don't consume fresh fruit according to the current trend, ________________________________________________ 4, Researchers have been studying the psychological phenomenon known as false memory since the mid-1970s. (PASSIVE VOICE) => _____________________________________________________________

Help me 2 câu này 1 ẩn tks verymuch

Giúp tôi câu 4 ( Thank you nhiều )

1.We haven’t been to a concert for over a year. -The last time………………………………… 2.Your birthday party was the last time I really enjoyed myself. -I………………………………………………………………. 3.It’s nearly 20 years since my father saw his brother. -My father……………………………………………… 4.Tom went to Scotland last Friday and is still there. -Tom has……………………………………………. 5.When did you last ride a bike? -How long is it………………………………………? 6.The last time I went swimming was when I was in France. -I haven’t…………………………………………………….. 7.You haven’t tided up this room for weeks. -It’s…………………………………………. 8.He was last in touch with me three weeks ago. - He hasn’t……………………………………….. 9.Mr John hasn’t visited France since 1990. -Mr John last……………………………………….. 10.It last rained three weeks ago.-It’s……………………………….. 11.I haven’t eaten this kind of food before. - This is the first………………………………. 12.What a pity you failed your driving test! -I wish……………………………………… 13.It’s a pity that you’re going away so soon. -I wish………………………………………… 14.I’m sorry I didn’t phone him yesterday. -I wish……………………………………..

LÀM GIÚP MÌNH NHÉ! a, Chứng minh rằng: $\frac{1}{4}$ < $\frac{1}{5}$+ $\frac{2}{5^{2}}$ + $\frac{3}{5^{3}}$ +...+ $\frac{2020}{5^{2020}}$ < $\frac{1}{3}$ b,Cho a; b; c; d ∈ N* thỏa mãn $\frac{a}{b}$ < $\frac{c}{d}$. Chứng minh rằng $\frac{2021a+c}{2021b+d}$ < $\frac{c}{d}$ Giải chi tiết giúp tớ nhé

em hãy nêu hình dạng, kích thước và cấu tạo vi khuản vi khuẩn có hại gì?

Cho 0,1 mol K td vừa đủ với dd hh H2SO4 0,5M và HCl 0,1M Tính V ddHCl và VddH2SO4 cần dùng

tính nhanh nhé $\frac{3}{1.4}$ + $\frac{3}{4.7}$ +$\frac{3}{7.10}$+ ...+ $\frac{3}{40.43}$ b) $\frac{1}{1.2.3}$ + $\frac{1}{2.3.4}$ +... +$\frac{1}{98.99.100}$