Câu hỏi:

16/07/2024 284

What does the author imply about penicillin?

A. Doctors seldom use it nowadays.

B. Some people are not affected by it.

C. It is an invaluable medical supply.

Đáp án chính xác

D. Mold combines with bacteria to make it.

Trả lời:

verified Giải bởi Vietjack

Tác giả có ý gì về penicillin?

A. Các bác sĩ hiếm khi sử dụng nó ngày nay.                        B. Một số người không bị ảnh hưởng bởi nó.

C. Là một nguồn cung cấp y tế vô giá.                                   D. Khuôn kết hợp với vi khuẩn để tạo ra.

Dẫn chứng: When he investigated further, he determined some of the many useful properties of penicillin, which has saved millions of lives over the past few decades.

Tạm dịch: Khi điều tra sâu hơn, ông đã xác định được một số trong nhiều đặc tính hữu ích của penicillin, cái đã cứu sống hàng triệu người trong vài thập kỷ qua.

Chọn đáp án là: C

Dịch bài đọc:

Một số lượng lớn các sáng chế đòi hỏi nhiều năm nghiên cứu và phát triển gian nan trước khi chúng được hoàn thiện. Thí dụ, Thomas Edison đã phải cố gắng hơn 1.000 lần để sáng chế ra bóng đèn sáng trước khi cuối cùng cũng thành công. Lịch sử có rất nhiều ví dụ khác của những người cố gắng, nhưng không thể làm sáng chế trước khi họ cuối cùng đã thành công. Tuy nhiên, một số sáng chế đã đến không phải thông qua công việc khó khăn, nhưng do tình cờ.

Trong hầu hết các trường hợp, khi người nào đó vô ý phát minh ra điều gì đó, nhà phát minh đã cố gắng tạo ra một thứ khác. Ví dụ, trong những năm 1930, nhà chế tạo thuốc Roy Plunkett đã cố gắng tạo ra một chất mới có thể sử dụng để làm lạnh các vật dụng. Ông pha trộn một số hóa chất với nhau. Sau đó, ông đưa chúng vào một thùng chứa áp lực và làm mát hỗn hợp. Đến thời điểm thử nghiệm của ông đã hoàn thành, ông đã có một phát minh mới. Nó không phải là một chất mới mặc dù có thể được sử dụng cho tủ lạnh. Thay vào đó, ông đã phát minh Teflon, ngày nay được sử dụng phổ biến nhất để chế tạo các chậu và chảo không dính. Tương tự, nhiều thập kỷ trước đó, John Pemberton là một dược sĩ ở Atlanta, Georgia. Ông đã cố gắng tạo ra một loại thuốc mà mọi người có thể sử dụng bất cứ khi nào họ bị nhức đầu. Trong khi ông không thành công trong nỗ lực đó, ông đã thành công trong việc sáng tạo ra Coca-Cola, nước uống có ga nổi tiếng thế giới.

Các nhà khoa học cũng đã có những khám phá quan trọng một cách tình cờ khi họ tiến hành các thí nghiệm. Năm 1928, Alexander Fleming phát hiện ra penicillin, một chất kháng sinh, theo cách này. Ông phát hiện ra một số nấm mốc phát triển trong một món ăn với một số vi khuẩn. Ông nhận thấy rằng vi khuẩn dường như tránh nấm mốc. Khi ông điều tra thêm, ông đã xác định một số tính chất hữu ích của penicillin, điều này đã cứu sống hàng triệu người trong vài thập kỷ qua. Tương tự như vậy, vào năm 1946, nhà khoa học Percy Spencer đã tiến hành thí nghiệm với lò vi sóng. Anh ta có một thanh kẹo trong túi, và anh nhận thấy nó tan chảy. Ông điều tra và học được lý do tại sao điều đó đã xảy ra. Ngay sau đó, ông đã chế tạo một thiết bị có thể sử dụng lò vi sóng để nướng thức ăn: lò vi sóng.

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