The author uses Alexander Fleming as an example of ________.
Giải bởi Vietjack
Đáp án B
Tác giả sử dụng Alexander Fleming làm ví dụ của ________.
A. một trong những nhà phát minh nổi tiếng nhất trong lịch sử
B. một người đã thực hiện một khám phá khoa học tình cờ
C. một người trở thành triệu phú từ phát minh của mình
D. một người đàn ông đã cống hiến cuộc đời mình cho khoa học y khoa
Thông tin: Scientists have also made crucial discoveries by accident when they were conducting experiments.
Tạm dịch: Các nhà khoa học cũng đã tình cờ có những khám phá quan trọng khi họ đang tiến hành thí nghiệm.
Gói VIP thi online tại VietJack (chỉ 400k/1 năm học), luyện tập gần 1 triệu câu hỏi có đáp án chi tiết
She __________ her job as an event manager to become a self-employed baker.
Peter and Dane are talking about environmental protection.
- Peter: “We should limit the use of plastic bags.”
- Dane: “ _____________. We can use paper bags instead.”
Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that is closest in meaning to each of the following questions.
I’m sure Linda was very upset when you left.
The people applauded __________ than before when Bobo the Clown came out.
Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.
The books ____________ by William Shakespeare are interesting.
My father said to me: “Why are you late? Did you miss the train?”
Students are restrained from eating bananas prior to an exam for __________ of failing 'like sliding on a banana skin'.
(38) __________ for all of you lefties, leftie-loving righties, and ambidextrous folks out there – it’s time to brush up on your left-handed knowledge and help put an end to leftie discrimination once and for all.
Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks from 34 to 38.
Left-handers are the odd ones out. Sure, lefties (34) __________ up about 10 percent of the population - but, frankly, it seems like society has forgotten about them. Just consider all of the right-handed gadgets, awkwardly designed desks, and cooking tools that fit comfortably only in your right hand. What (35) __________ someone to become a lefthand? Scientists aren’t exactly sure, but research points to a complex makes between genes and environment. While no exact set of “leftie genes” have been discovered, people who dominantly use their left hands do have (36) __________ left-handed family members. And researchers have found different brain wirings in righties vs. lefties. But no matter (37) ______ it is that drives someone to use their antipodal paw, science has also uncovered a particular set of personality traits that left-handed people tend to have. (38) __________ for all of you lefties, leftie-loving righties, and ambidextrous folks out there – it’s time to brush up on your left-handed knowledge and help put an end to leftie discrimination once and for all.
(Adapted from FCE Use of English)
Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions from 44 to 50
A large number of inventions require years of arduous research and development before they are perfected. For instance, Thomas Edison had to make more than 1,000 attempts to invent the incandescent light bulb before he finally succeeded. History is replete with numerous other examples of people trying, yet failing to make inventions before they eventually succeeded. Yet some inventions have come about not through hard work but simply by accident.
In most cases, when someone unintentionally invented something, the inventor was attempting to create something else. For example, in the 1930s, chemist Roy Plunkett was attempting to make a new substance that could be used to refrigerate items. He mixed some chemicals together. Then, he put them into a pressurized container and cooled the mixture. By the time his experiment was complete, he had a new invention. It was not a new substance that could be used for refrigeration though. Instead, he had invented Teflon, which is today most commonly used to make nonstick pots and pans. Similarly, decades earlier, John Pemberton was a pharmacist in Atlanta, Georgia. He was attempting to create a tonic that people could use whenever they had headaches. While he was not successful in that endeavor, he managed to invent Coca - Cola, the world - famous carbonated soft drink.
Scientists have also made crucial discoveries by accident when they were conducting experiments. In 1928, Alexander Fleming discovered penicillin, an antibiotic, in this manner. He discovered some mold growing in a dish with some bacteria. He noticed that the bacteria seemed to be avoiding the mold. 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. Likewise, in 1946, scientist Percy Spencer was conducting an experiment with microwaves. He had a candy bar in his pocket, and he noticed that it suddenly melted. He investigated and learned the reason why that had happened. Soon afterward, he built a device that could utilize microwaves to heat food: the microwave oven.
(Adapted from https://oureverydaylife.com/)
Which title best summarizes the main idea of the passage?
