. Choose a word in each line that has different sound pat 1. A. weave B. bread C. weak D. beach 2. A. worked B. pumped C. watched D. contented 3. A. attraction B. artisan C. frame D. handicraft 3 / 6 4. A. drumhead B. illustration C. earplug D. drugstore 5. A. strip B. visual C. artistic D. remind 6. A. thread B. treat C. pleasure D. deadline 7. A. embroider B. preserve C. benefit D. effect

II. Choose a word in each line that has different stress pattern. 1. A. bamboo B. pottery C. workshop D. famous 2. A. business B. fabulous C. lantern D. experience 3. A. communicate B. museum C. authenticity D. environment 4. A. handicraft B. department C. embroider D. opinion 5. A. transfer B. accept C. publish D. remind 6. A. department B. historical C. technique D. pottery 8. A. balloon B. conical C. cultural D. local 9. A. sculpture B. temperate C. delighted D. culture

1 đoạn mạch có A=400 nucleotit,biết tổng số của 4 loại là 1000 nuvleotit. Tìm số nucleotit mỗi loại?