Trong phản ứng oxi hoá – khử, chất nhường electron được gọi là

Find the mistake: What did you do at 9 o'clock last night? I phoned you but nobody answered.

Cho biết: Khối thứ hai trong sơ đồ khối mạch điều khiển tín hiệu là?

Nhận xét nào sau đây là đúng về thụ tinh kép?

Một trong những thách thức của chủ nghĩa tư bản hiện đại là

Tầng lớp tư sản dân tộc ra đời xuất phát từ

Chiến thắng Vạn Tường (tháng 8-1965) của quân dân miền Nam Việt Nam đã 

Máy tính trở thành công cụ lao động không thể thiếu được trong xã hội hiện đại vì:

Khung tên thể hiện:

Miền Đông Trung Quốc nổi tiếng về loại khoáng sản nào sau đây?

Chuỗi sau được in ra mấy lần?

s = "abcdefghi"

for i in range(10):

    if i % 4 == 0:

        print(s)  

Người ta muốn làm một cái bể dạng hình hộp chữ nhật không nắp (như hình vẽ) có thể tích bằng \(1{{\text{m}}^{3}}\). Chiều cao của bể là \(5\)dm, các kích thước khác là \(x\)m, \(y\)m với \(x>0\) và \(y>0\). Diện tích toàn phần của bể (không kể nắp) là hàm số \(S\left( x \right)\) trên khoảng \(\left( 0;+\infty \right)\). Đường tiệm cận xiên của đồ thị hàm số \(S\left( x \right)\) là đường thẳng \(y=ax+b\). Giá trị của biểu thức \(P={{a}^{2}}+{{b}^{2}}\) bằng

Đâu là nhân tố quan trọng nào giúp diện tích ruộng đất từ thế kỉ X đến XV ngày càng được mở rộng?

Biểu hiện của thị trường tài chính quốc tế mở rộng là gì?

Nhận định nào dưới đây thể hiện chức năng của Ủy ban nhân dân?

Mark the letter A, B, C or D on your answer sheet to indicate the best arrangement of utterances or sentences to make a meaningful exchange or text in each of the following questions from 13 to 17.

a. Secondly, swimming is an excellent way to keep myself fit and healthy.

b. Among my favourite sports and hobbies, I like swimming the best for several reasons.

c. Firstly, I think playing in the water could bring great joy. It also helps reduce stress and I always feel refreshed and relaxed after swimming for about half an hour.

d. It helps build up my muscle strength and prevent many heart and lung diseases.

e. Finally, besides being a great sport, swimming is also an important survival skill, because without knowing how to swim well, it could be dangerous if there is a flood, or simply if we want to play near bodies of water.

Find the word which has a different sound in the part underlined.

Read the following leaflet and mark the letter A, B, C, or D on your answer sheet to indicate the option that best fits each of the numbered blanks from 7 to 12.

ANNOUNCEMENT OF CHINESE SPEAKING CONTEST

The (7) ___ would like to announce:

● We ___(8)___ a Chinese Speaking Competition on June 01.

● All students ___(9)___ in speaking Chinese can take part in this exciting contest!

● Express your ideas confidently, ___(10)___ you build your self-assurance in using Chinese.

● Get ready to share your thoughts ___(11)___ our friendly atmosphere.

● Keep an eye out for more details ___(12)___ to participate in the contest!

Read the passage below and choose A, B, C or D to answer each question from 641 to 645.

Cities develop as a result of functions that they can perform. Some functions result directly from the ingenuity of the citizenry, but most functions result from the needs of the local area and of the surrounding hinterland (the region that supplies goods to the city and to which the city furnishes services and other goods). Geographers often make a distinction between the situation and the site of a city. Situation refers to the general position in relation to the surrounding region, whereas site involves physical characteristics of the specific location. Situation is normally much more important to the continuing prosperity of a city. If a city is well situated in regard to its hinterland, its development is continuing prosperity of a city. If a city is well situated in regard to its hinterland, its development is much more likely to continue. Chicago, for example, possesses an almost unparalleled situation: it is located at the southern end of a huge lake that forces east-west transportation lines to be compressed into its vicinity, and at a meeting of significant land and water transport routes. It also overlooks what is one of the world’s finest large farming regions. These factors ensured that Chicago would become a great city regardless of the disadvantageous characteristics of the available site, such as being prone to flooding during thunderstorm activity.

Similarly, it can be argued that much of New York City’s importance stems from its early and continuing advantage of situation. Philadelphia and Boston both originated at about the same time as New York and shared New York’s location at the western end of one of the world’s most important oceanic trade routes, but only New York possesses an easy-access functional connection (the Hudson- Mohawk Lowland) to the vast Midwestern Hinterland. This account does not alone explain New York’s primacy, but it does include several important factors. Among the many aspects of situation that help to explain why some cities grow and others do not, original location on a navigable waterway seems particularly applicable. Of course, such characteristics as slope, drainage, power resources, river crossings, coastal shapes, and other physical characteristics help to determine city location, but such factors are normally more significant in early stages of city development than later.

According to the passage, Philadelphia and Boston are similar to New York City in ______.

Đại lượng nào sau đây không phụ thuộc vào hướng vectơ vận tốc của vật?

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions:

Whenever I visited her, my grandmother _________ my favorite cake for me.