参考答案:1. had seen 2. has changed 3. had become 4. hadn't seen 5. have read 6. has made 7. has been cut 8. had left 9. had expected 10. had invented 11. had borrowed 12. have visited 13. has increased 14. has been made 15. have written 16. has been reached 17. had ...
" recalls: "I used to tell my class that Maxim was so infuriated by this that he went home and invented the machine gun." Schobert emphasizes this was a joke, but indeed Maxim's machine gun is another invention with vast societal impact....
Given how special bicycle kicks are, it should come as no surprise that there’s some argument about exactly who invented the bicycle kick. Some soccer historians claim Ramon Unzaga invented the bicycle kick in 1914 in Talcahuano, Chile. Others believe the bicycle kick may have been invented ...
and even to grow their businesses. But there’s incentive for them to build and/or host their own models once they reach scale. And many model providers have highly skewed customer distributions, with a few apps representing the majority of revenue. What happens if/when these customers ...
In 1947, the transistor(晶体管)was invented. This made it possible to build a smaller computer. The invention of integrated circuits(集成电路)then took the jobs of many electronic parts and put them into one part. Then microprocessors(微处理器)were invented, which took lots of integrated circu...
notable improvements; it was cylindrical rather thansquare, and water jets helped blast at the London clay to assist labourers with digging. (There's some controversy over who invented what/was inspired by who when it came to these shields, but Greathead's is the name that has persevered...
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Reif also understood a larger point about the book. The students around him did not know a lot about MIT—they pronounced it “mighty”—but they knew it was special: the kind of institution where the things you read about in textbooks get invented or discovered, and then taught by the ...
Having a son as a woman who has only really been around women can be a strange experience. I sometimes tell my husband that raising our 3-year-old boy someone dropped me off on another planet where I didn’t know the and had no map. My son makes me la
In 1913,an item called the Erector Set was invented.It was a steel, motorized toy that children could use to build models of anything.Its creator was A.C.Gilbert, a medical doctor. Charles Pajeau created a similar wooden set called Tinker Toys in the year 1914.Tinker Toys were made for...