Có 3 điện trở mà trên vỏ có ghi giá trị sử dụng lần lượt là 3Ω-2A, 6Ω - 1A, 2Ω- 4A. 1. Khi ghép nối tiếp 3 điện trở thì bộ này chịu được hiệu điện thế tối đa là bao nhiêu? 2. Khi ghép song song 3 điện trở trên thì bộ này chịu được cường độ dòng điện tối đa là bao nhiêu? 3. Tìm cách ghép để bộ điện trở chịu được hiệu điện thế lớn nhất? Tìm hiệu điện thế lớn nhất đó. Bạn nào trả lời nhanh sẽ được hay nhất, zô đi mn :>

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Chu Van An was born in 1292 and died in 1370. From his (1)..........., he was famous for his (2)............. He did not have the dream (3)................ taking part in exams to become mandarinslike other students. Chu Van An stayed at home and (4) ............. hímelf by reading books and opened schools. His school quickly became famous in the region and many students from other places went there to study. Emperor Tran Minh Tong invited Chu Van An (5)................ the principal of the lmperial Academy to teach his crown prince and other students to become talented people for the country. ln 1359, Emperor Tran Minh Tong gave his crown to his son, Tran Hien Tong, the court and the country were (6)......... However, this period lasted only for twelve years. Then Emperor Tran Hien Tong died and Tran Du Tong inherited the crown. The social (7)........... became complicated , the people were very poor anf hard and many goof people wre killed. Chu Van An (8)........ submitted a petition which requested the Emperor to beheand seven perfidious mandarins , so it was called " Seven Beheaded Petition " ( That Tram So ). " Seven Beheaded Petition" became the symbol of the courageous attitude of the real intellectuals and of Chu Van An's spirit. 1. A.childless B.children C.childhood D.childish 2. A.intelligent B.intelligence C.intelligences D.intelligently 3. A.of B.to C.for D.in 4. A.found B.did C.knew D.taught 5. A.to be B.was C.is D.be 6. A.peace B.oeacefully C.peacefulness D.peaceful 7. A.situationv B.condition C.state D.position 8. A.bravery B.bravely C.brave D.braved