Giúp lẹ với ạ
Many students think that going to school by electric bike useful.Do you agree?
Write an paragraph of about 150 words to express your opinion
23 phút trước
I agree with the above opinion, because I think that using bicycles to go to school will help us shorten the time to go to school instead of walking. It is very convenient. If you ride a bicycle to school, your parents won't have to worry about driving you to school on time and you think so too, right? Cycling to school is not only convenient, but in going out, eating, working, you can also use a bicycle. Due to the small bicycle area, you can wriggle through the small alleys. And that's my pers...
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I agree with the above opinion, because I think that using bicycles to go to school will help us shorten the time to go to school instead of walking. It is very convenient. If you ride a bicycle to school, your parents won't have to worry about driving you to school on time and you think so too, right? Cycling to school is not only convenient, but in going out, eating, working, you can also use a bicycle. Due to the small bicycle area, you can wriggle through the small alleys. And that's my personal opinion, I find cycling to school very useful.
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I used to think the same way,too .But after I heard my teacher explain the uses of the electric bike last week,I had some different thoughts.Electric bike have both positive and negative sides.On the good side,it to protect the environment,it doesn't produce smoke.It also smooth when driving.On the bad side,it makes students get lazy.They don't walk but drive for a short distance and that'll cost them money.So,in my opinion,electric bike is very useful,but it will be harmful if you depend on it...
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I used to think the same way,too .But after I heard my teacher explain the uses of the electric bike last week,I had some different thoughts.Electric bike have both positive and negative sides.On the good side,it to protect the environment,it doesn't produce smoke.It also smooth when driving.On the bad side,it makes students get lazy.They don't walk but drive for a short distance and that'll cost them money.So,in my opinion,electric bike is very useful,but it will be harmful if you depend on it too much.
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Viết PTHH thực hiện sơ đồ sau. Giúp em với ạ, em cảm ơn
$\rm Fe + 2HCl \rightarrow FeCl_2 + H_2$
$\rm FeCl_2 + 2KOH \rightarrow Fe(OH)_2 \downarrow + 2KCl$
$\rm Fe(OH)_2 \xrightarrow[\text{chân không}]{t^o} FeO + H_2O$
$\rm FeO + H_2 \xrightarrow{t^o} Fe + H_2O$
$\rm 2Fe + 3Cl_2 \xrightarrow{t^o} 2FeCl_3$
$\rm FeCl_3 + 3NaOH \rightarrow Fe(OH)_3 \downarrow + 3NaCl$
$\rm 2Fe(OH)_3 \xrightarrow{t^o} Fe_2O_3 + 3H_2O$
$\rm Fe_2O_3 + 3CO \xrightarrow{t^o} 2Fe + 3CO_2$
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\(Fe+2HCl\xrightarrow[]{}FeCl_2+H_2\)\(FeCl_2+2NaOH\xrightarrow[]{}Fe\left(OH\right)_2+2NaCl\)\(Fe\left(OH\right)_2\xrightarrow[]{t^o}FeO+H_2O\)\(FeO+H_2\xrightarrow[]{t^o}Fe+H_2O\)\(2Fe+3Cl_2\xrightarrow[]{t^o}2FeCl_3\)\(FeCl_3+3KOH\xrightarrow[]{}Fe\left(OH\right)_3+3KCl\)\(2Fe\left(OH\right)_3\xrightarrow[]{t^o}Fe_2O_3+3H_2O\)\(Fe_2O_3+3CO\xrightarrow[]{t^o}2Fe+3CO_2\)
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\(Fe+2HCl\xrightarrow[]{}FeCl_2+H_2\)
\(FeCl_2+2NaOH\xrightarrow[]{}Fe\left(OH\right)_2+2NaCl\)
\(Fe\left(OH\right)_2\xrightarrow[]{t^o}FeO+H_2O\)
\(FeO+H_2\xrightarrow[]{t^o}Fe+H_2O\)
\(2Fe+3Cl_2\xrightarrow[]{t^o}2FeCl_3\)
\(FeCl_3+3KOH\xrightarrow[]{}Fe\left(OH\right)_3+3KCl\)
\(2Fe\left(OH\right)_3\xrightarrow[]{t^o}Fe_2O_3+3H_2O\)
\(Fe_2O_3+3CO\xrightarrow[]{t^o}2Fe+3CO_2\)
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giải thích tại sao số 0 lại có giá trị(ấn độ cổ đại)
Giúp e vs ạ
cho hình vuông ABCD có AC cắt BD tại O .Gọi E và F theo thứ tự là các điểm đ/xứng vs O qua AD và BC a) Cm tứ giác AODE là hình vuông b) Nối EC cắt DF tại I CMR OI vuông góc vs CD c) Biết diện tích của hình lục giác ABFCDE=6.Tính độ dài cạnh hình vuông ABCD d) Lấy K là 1 điểm bất kì của cạnh BC. Gọi G là trọng tâm của tam giác AIK.CMR G thuộc một đ/thẳng cố định khi K di chuyển trên BCgiúp em vs (kèm theo hình hộ em vs ạ)
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cho hình vuông ABCD có AC cắt BD tại O .Gọi E và F theo thứ tự là các điểm đ/xứng vs O qua AD và BC
a) Cm tứ giác AODE là hình vuông
b) Nối EC cắt DF tại I CMR OI vuông góc vs CD
c) Biết diện tích của hình lục giác ABFCDE=6.Tính độ dài cạnh hình vuông ABCD
d) Lấy K là 1 điểm bất kì của cạnh BC. Gọi G là trọng tâm của tam giác AIK.CMR G thuộc một đ/thẳng cố định khi K di chuyển trên BC
giúp em vs (kèm theo hình hộ em vs ạ) 
19, Jean cloth was made completely from cotton in the \(18^{th}\) century20, You can write an English letter, can't you?21, The last time everybody saw Tom was a week ago.22, The English test will be taken by all the students of the ninth form next week.23, Our teeth should be brushed carefully after meals.24, The traffic rules must be observed strictly25, Their homework was done well.26, I wish I didn't have to do homework every night.
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19, Jean cloth was made completely from cotton in the \(18^{th}\) century
20, You can write an English letter, can't you?
21, The last time everybody saw Tom was a week ago.
22, The English test will be taken by all the students of the ninth form next week.
23, Our teeth should be brushed carefully after meals.
24, The traffic rules must be observed strictly
25, Their homework was done well.
26, I wish I didn't have to do homework every night.
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chọn và GIẢI THÍCH
the police arrived to find a .......... of horrifying destruction
A, SCENE
B, SCENERY
C, LANDSCAPE
D, SCENERY
chọn và GIẢI THÍCH
no ------ in moscow are more historic than the kremlin
a, sceneries
b, landscapes
c, sights
d, scenes
Cho đường tròn (O), bán kính=15cm. Điểm A nằm ngoài đường tròn,OA=25cm. Kẻ tiếp tuyến AB với đường tròn (O). kẻ dây BC vuông góc với AO tại H
a) CMR: AC là tiếp tuyến của đường tròn (O)
b) Tính các cạnh của tam giác ABC