Cho cây hoa trắng tự thụ phấn thu được F₁ có 3 loại kiểu hình, trong đó cây hoa trắng chiếm tỷ lệ 75%. Trong những cây hoa trắng ở F₁, loại cây không thuần chủng chiếm tỷ lệ:

A. 4/9

B. 1/6

C. 5/6

D. 2/9

Read the following passage carefully, and then select the best option A, B, C or D to complete it

World Wide Web (WWW), computer-based (1) _______ of information resources that combines text and multimedia. The information on the World Wide Web can be accessed and searched through the (2) _______, a global computer network. The World Wide Web is often (3) _______ to simply as “the Web.”

The Web started to become a (4) _______ resource after 1993 when the first widely distributed browser provided a convenient way to (5) _______ a variety of information on the Internet. The Web uses (6) _______, which means that information can be displayed in a wide variety of formats. (7) _______ can read text, view pictures, watch animation, listen to sounds, and even explore interactive virtual environments on the Web. A user can (8) _______ seamlessly from a document or Web page stored on the computer to a document or Web page (9) _______ on another computer.

The Web offers a place where companies, universities and (10) _______ institutions, and individuals can display information about their products, services, facilities, or research, or their (11) _______ lives. Only a small percentage of information on the (12) _______ is restricted to subscribers or other authorized users. The majority of Web pages are available to (13) _______ who can access a computer that connects to the Internet. The Web has become a (14) _______ for many companies selling products or services, and a forum for people to exchange opinions and information. Museums, libraries, government agencies, and schools post information on the Web to make it (15) _______ to others.

Question 4:

A. popular

B. normal

C. ordinary

D. favorite

Read the passage below carefully, and then decide whether the statements are true (T), false (F) or not given (N)

The meanings of the terms science and technology have changed significantly from one generation to another. More similarities than differences, however, can be found between the terms.

Both science and technology imply a thinking process, both are concerned with causal relationships in the material world, and both employ an experimental methodology that results in empirical demonstrations that can be verified by repetition. Science, at least in theory, is less concerned with the practicality of its results and more concerned with the development of general laws, but in practice science and technology are inextricably involved with each other. The varying interplay of the two can be observed in the historical development of such practitioners as chemists, engineers, physicists, astronomers, carpenters, potters, and many other specialists. Differing educational requirements, social status, vocabulary, methodology, and types of rewards, as well as institutional objectives and professional goals, contribute to such distinctions as can be made between the activities of scientists and technologists; but throughout history the practitioners of “pure” science have made many practical as well as theoretical contributions.

Question: Science, at least in theory, is more concerned with the development of general laws and less concerned with the practicality of its results.

A. True

B. False

C. Not given

Môi trường bao gồm các yếu tố nào dưới dây ?

A. Ngôi nhà.

B. Rừng

C. Rác thải.

D. Cả A,B, C.

A. Lưu hình ảnh thành

B. Sao chép hình ảnh

C. Sao chép địa chỉ hình ảnh

D. Sao chép địa chỉ liên kết

I want my car _______ by him.

A. to be repaired

B. be repaired

C. being repaired

D. will repair