tổng các nghiệm của phương trìnhcos2x-sin2x=1 trong khoảng left ( 0;2pi

Read the following passage and mark the letter A, B, C, or D to indicate the answer to each of the questions from 23 to 27.

Sylvia Earle is an underwater explorer and marine biologist who was born in the USA in 1935. She became interested in the world's oceans from an early age. As a child, she liked to stand on the beach for hours and look at the sea, wondering what it must be like under the surface.

Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the questions from 33 to 39.

Emily had just finished saving all the documents. The computer crashed then.

The police are seeking an old man for their alleged involvement in international terrorism.

His first book is published in association with British Heritage in 1990

She is a writer as well as a distinguishable modern historian.

I found Japanese to be very hospitable.