cho biết ý nghĩa kinh tế của kênh đào panama

Rewrite the following sentences without changing their original meanings.

31. Someone has stolen by bicycle.

My bicycle ………………………………………………………………………..

32. If she doesn’t work hard, she will not pass his exam.

Unless ……………………………………………………………………………..

33. I don’t have free time, so I can’t go with you.

If I ……………………………………………...………………………………….

34. Tam ate a lot last night, so she had a stomachache.

Because....................................................................................................................

There is a mistake in each sentence. Find and correct it.

35. Water  pollute in the lake has made the fish die.                           ________________

         A         B                          C                       D.

36. Factories  won’t dump waste into rivers if the government will fine them heavily.    

            A                 B                    C                                               D

Make sentences, using the cues given.

37. Noise pollution/ big cities/ lead/ hearing/ problems.

……………………………………………………………………………………………

38. When/ rescuers/ arrive/ whole family/ already/ evacuate.       

……………………………………………………………………………………………

Read the following passage then answer the questions.

Alaska is perhaps the most amazing state in the USA. It has coaslines facing both the Arctic Ocean and the Pacific Ocean. This state has an incredible three million lakes. That’s four lakes per person living there.

Many cities in Alaska cannot be reached by road, sea, or river. The only way to get it and out is by air, on foot, or by dogsled. That’s why Alaska has the busiest sea airport in the world, Lake Hood Seaplane Base. Nearly two hundred float planes take off and land on the water of this airport every day. It’s really a fun scene to watch.

Alaska is called the Land of Midnight Sun because in summer, the sun does not set for nearly three months. But in winter the sun stays almost unseen.

   All Alaskans take place special pride in their beautiful and unique state.

27. Where is Alaska?

……………………………………………………………………………………………

28. Does it have a lot of lakes?

……………………………………………………………………………………………

29. How do we get there?

……………………………………………………………………………………………

30. Why is Alaska called the Land of Midnight Sun?

……………………………………………………………………………………………

Tính
a)$\frac{5}{6}-\frac{2}{36}$
b) $\frac{-3}{5}-\frac{5}{6}$
d)$\frac{13}{16}-1$
e) $\frac{-3}{4}-\left(-3\right)$
f) $\frac{4}{3}\times 7$
H) $\frac{5}{6}-\frac{2}{36}$

Cho 5,6 gam sắt tác dụng với 1,68 lít khí Cl2 (đkc). Tính khối luợng các chất sau phản ứng

giải phương trình

a) 8x – 3 = 5x + 12

b) (3x - 2)(4 + 5x) = 0
c) ( x + 5 ) ( x – 3 ) + $x^2$ – 25 = 0

d)$\left(x+\frac{2}{4}\right)-x+3=1-\frac{x}{8}$

$\frac{3}{4}\times \frac{3}{4}\times 3,14=$

Một hình lập phương và một hình chữ nhật có thể tích bằng nhau. Cạnh của hình lập phương bằng chiều cao của hình hộp chữ nhật. Đáy hình hộp chữ nhật có chiều dài 40cm, chiều rộng 10cm.

khối lượng riêng của nước g/ml

Cho 5,6 gam sắt tác dụng với 1,68 lít khí Cl2 (đkc). Tính khối luợng các chất sau phản ứng

Tính giá trị biểu thức
A (255 -146,4) :4,8 +23,15
B 12,87+63,27:1,5 -3,345
C 12,76×5,6-35,897
D 34,5×78,95+78,95×65,5