Thứ bảy, 18/05/2024
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Câu hỏi:

28/10/2022 99

With no vaccine to protect against influenza infection and no antibiotics to treat secondary bacterial infections that can be associated with influenza infections, control efforts worldwide were limited to non-pharmaceutical interventions such as isolation, quarantine, good personal hygiene, use of disinfectants, and limitations of public gatherings, (30) ______ were applied unevenly.


A. when      


B. where               

C. which               

Đáp án chính xác

D. that

Trả lời:

verified Giải bởi qa.haylamdo.com

Giải thích: Sau chỗ trống là động từ ở thể bị động nên cần điền đại từ quan hệ đứng làm chủ ngữ, “that” không đứng sau dấu phẩy nên phương án C phù hợp nhất.
 
Chọn C
 

Đại dịch cúm năm 1918 là đại dịch nghiêm trọng nhất trong lịch sử gần đây. Nó được gây ra bởi một loại vi-rút có tên H1N1 mà gen có nguồn gốc từ chim. Mặc dù không có sự đồng thuận phổ biến về nguồn gốc của virus nhưng nó đã lan rộng trên toàn thế giới trong giai đoạn 1918-1919. Ở Hoa Kỳ, bệnh lần đầu tiên được xác định trong quân nhân vào mùa xuân năm 1918.

Người ta ước tính rằng khoảng 500 triệu người hoặc một phần ba dân số thế giới đã bị nhiễm loại virus này. Số người chết được ước tính ít nhất là 50 triệu trên toàn thế giới với khoảng 675.000 người xảy ra ở Hoa Kỳ. Tỷ lệ tử vong cao ở những người dưới 5 tuổi, 20-40 tuổi và 65 tuổi trở lên. Tỷ lệ tử vong cao ở những người khỏe mạnh, bao gồm cả những người trong độ tuổi 20-40, là một đặc điểm độc đáo của đại dịch này.

Mặc dù vi-rút cúm 1918 đã được tổng hợp và đánh giá nhưng các đặc tính khiến nó có sức tàn phá như vậy vẫn không được hiểu rõ. Không có vắc-xin để bảo vệ chống nhiễm cúm và không có kháng sinh để điều trị nhiễm vi khuẩn thứ cấp có thể liên quan đến nhiễm cúm, các nỗ lực kiểm soát trên toàn thế giới chỉ giới hạn ở các can thiệp phi dược phẩm như cách ly, kiểm dịch, vệ sinh cá nhân tốt, sử dụng thuốc khử trùng và hạn chế các cuộc tụ họp công cộng được áp dụng không đồng đều.

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