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Câu hỏi:
Which sentence in the second paragraph describes Salk's first work at the University of Pittsburgh?
- A. The first sentence
- B. The second sentence
- C. The third sentence
- D. None of the above.
Lời giải tham khảo:
Đáp án đúng: B
Đáp án B
Câu nào trong đoạn văn thứ 2 mô tả công việc đầu tiên của Salk tại Đại học Pittsburgh?
Thông tin trong bài: "Working with scientists from other universities in a program to classify the various strains of the polio virus, Salk corroborated other studies in identifying three separate strains." (Làm việc với các nhà khoa học từ các trường đại học khác trong một chương trình phân loại các chủng vi rút bại liệt khác nhau, Salk đã chứng thực các nghiên cứu khác trong việc nhận diện ba chủng riêng biệt.)
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