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27 tháng 12 2023
Pho is one of my favorite foods. Pho is the most popular and special dish in our country, Vietnam. There are two main kinds of Pho: Pho with beef and Pho with chicken. Pho is served in a bowl with a specific cut of white rice noodles in clear beef broth, with slim cuts of beef (steak, fatty flank, lean flank, brisket). Chicken Pho is made using the same spices as beef, but the broth is made using only chicken bones and meat, as well as some internal organs of the chicken, such as the heart, the undeveloped eggs and the gizzard. I always enjoy a bowl of hot and spicy Pho for breakfast. Mornings are a special time for pho in Vietnam. I love Pho and I can eat it every morning without boring.
27 tháng 12 2023
Favorite drink: Vietnam is a tropical country. So there are many kinds of foods and drinks to choose. I like all kinds of fruits such as avocado, mango, orange, apple, etc. But the drink I love most is avocado smoothie. This healthy smoothie is perfect for a breakfast, a quick snack, or whenever I need a healthy boost. Avocados are high in fat, healthy type of fat. They also contain fat-soluble vitamin E, vitamin C. Especially, avocados are an excellent source of antioxidant carotenoids like alpha-carotene, beta-carotene, beta-cryptoxanthin, lutein and zeaxanthin that may help slow aging, prevent certain cancers, heart disease, lose weight and improve your skin tone. Let’s enjoy our instant breakfast avocado smoothie and have an awesome day!
NT
Nguyễn Thị Thương Hoài
Giáo viên
VIP
7 tháng 9 2023
Olm cảm ơn em, cảm ơn cảm nhận của em sau khi học bài trên olm.
Chúc em học tập vui vẻ và hiệu quả cùng olm em nhé
HT
1
NV
Nguyễn Việt Lâm
Giáo viên
14 tháng 9 2021
\(B_2=\left\{x;x=2k,k\in N\right\}\)
\(B_4=\left\{x;x=4m,m\in N\right\}\)
Do \(4m=2.\left(2m\right)\Rightarrow B_4\subset B_2\)
\(\Rightarrow B_2\cap B_4=B_4\)
DT
Đỗ Thanh Hải
CTVVIP
27 tháng 4 2021
VCl2 giảm = VCl2 phản ứng = 6,72 lít
=> nCl2 = 6,72 : 22,4 = 0,3 mol
2M + nCl2 \(\xrightarrow[]{t^o}\) 2MCln
\(\dfrac{0,6}{n}\) 0,3
Bảo toàn khối lượng: mM = m muối - mCl2 = 32,5 - 0,3.71 = 11,2g
=> M = \(\dfrac{11,2}{\dfrac{0,6}{n}}=\dfrac{56n}{3}\)
Do M là kim loại nên n nhận giá trị 1, 2, 3
Với n = 3 => M : Fe
10 tháng 10 2021
\(B=\sqrt{\dfrac{1}{3}}+\dfrac{\sqrt{3}-1}{\sqrt{3}+1}+\dfrac{2}{\sqrt{3}}-\dfrac{3-\sqrt{3}}{\sqrt{3}-1}\)
\(\Rightarrow B=\dfrac{\sqrt{1}}{\sqrt{3}}+\dfrac{\left(\sqrt{3}-1\right)^2}{\left(\sqrt{3}+1\right)\left(\sqrt{3}-1\right)}+\dfrac{2}{\sqrt{3}}-\dfrac{\sqrt{3}\left(\sqrt{3}-1\right)}{\sqrt{3}-1}\)
\(\Rightarrow B=\left(\dfrac{1}{\sqrt{3}}+\dfrac{2}{\sqrt{3}}\right)+\dfrac{3-2\sqrt{3}+1}{\left(\sqrt{3}+1\right)\left(\sqrt{3}-1\right)}-\sqrt{3}\)
\(\Rightarrow B=\dfrac{3}{\sqrt{3}}+\dfrac{4-2\sqrt{3}}{\left(\sqrt{3}+1\right)\left(\sqrt{3}-1\right)}-\sqrt{3}\)
\(\Rightarrow B=\sqrt{3}+\dfrac{4-2\sqrt{3}}{\sqrt{3^2}-1^2}-\sqrt{3}\)
\(\Rightarrow B=\dfrac{4-2\sqrt{3}}{2}\)
\(\Rightarrow B=2-\sqrt{3}\)
HN
10 tháng 10 2021
⇔ \(B=\dfrac{1}{\sqrt{3}}+\dfrac{\left(\sqrt{3}-1\right)\left(\sqrt{3}-1\right)}{\left(\sqrt{3}-1\right)\left(\sqrt{3}+1\right)}+\dfrac{2}{\sqrt{3}}-\dfrac{\sqrt{3}\left(\sqrt{3}-1\right)}{\sqrt{3}-1}\)
⇔ \(B=\dfrac{\text{3}}{\sqrt{3}}+\dfrac{3-2\sqrt{3}+1}{3-1}-\sqrt{3}\)
⇔ \(B=\sqrt{3}+\dfrac{\text{4}-2\sqrt{3}}{\text{2}}-\sqrt{3}\)
⇔ \(B=\dfrac{2\left(2-\sqrt{3}\right)}{2}=2-\sqrt{3}\)
LK
0
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