a, \(N=\dfrac{1050}{35\%}=3000\)

\(\Rightarrow L=\dfrac{N}{2.3,4}=5100A^o\)

b, \(\%X=\%G=35\%\)

Có : \(\%G+\%A=50\% \)

\(\Rightarrow\%A=\%T=15\%\)

1. used to smoke
2. am used to living
3. is used to buying and selling (câu này mk k chắc)
4. used to dream

1. The man, whom you visited last month, is a famous scientist.
2. A lot of information have been stored in the computer.
3. The town where we visited last year was very beautiful and peaceful.
4. My father is used to drinking tea in the morning.
5. Neil has passed his examination which is good news.
6. I used to stay up late when I was young.

1. A
2. C
3. B
4. C
5. B
6. B

ADCT: v_{chạm đất} =\(\sqrt{2gh}\)
\(\Rightarrow\sqrt{2.9,8.4,9}\) = \(9,8\) m/s

Cho tam giác ABC có B ^ = C ^  thì

A. AC > AB

B. AC = AB

C. AC < AB

D. Cả ba đáp án trên đều sai

ADCT: \(\Delta h=\dfrac{g}{2}\left(2t-1\right)\)

\(\Rightarrow5=\dfrac{10}{2}\left(2t-1\right)\)

\(\Leftrightarrow5=10t-5\)

\(\Leftrightarrow10t=10 \Rightarrow t=1\)s
vậy tgian rơi là 1s
ADCT: \(h=\dfrac{gt^2}{2}=\dfrac{10.1^2}{2}=5m\)

vậy độ cao thả vật là 5m

Miền Bắc tiến hành cải tạo quan hệ sản xuất trong khoảng thời gian nào?

A. 1954 - 1956

B. 1956 - 1958

C. 1958 – 1960

D. 1954 - 1957