新東方·新托福考試專項進階:高級閱讀 epub pdf mobi txt 電子書 下載 2025
發表於2025-05-01
新東方·新托福考試專項進階:高級閱讀 epub pdf mobi txt 電子書 下載 2025
Timothy Hall,畢業於美國哥倫比亞大學,英語語言學專業碩士。
Arthur H. Milch,美國新澤西學院TESOL專業教育學碩士。
Denise McCormack,美國新澤西學院TESOL專業教育學碩士。
The principles making radio possible were developed throughout the nineteenth century. The first breakthrough was by the British physicist Michael Faraday in 1831. He discovered that when an electric current passes through one wire, it produces a current in another wire even though the wires do not touch each other. In 1864, James Maxwell showed that this current——composed of electromagnetic waves——travels at the speed of light. Heinrich Hertz proved that the waves pass through solid objects. With these discoveries in place, the race was on to develop a system of wireless radio.
Among the contenders was Reginald Fessenden, a Canadian inventor. Fessenden began experimenting with radio detectors in order to explore the possibility of voice transmission. In 1900, he was the first person to transmit his voice, but the sound was unrecognizable because the waves were not continuous. He invented a barreter detector, taking its name from the French word exchanger, to receive AM (amplitude modulated) signals, but it was not sensitive enough. One day in 1901, he accidentally left a filament of wire in acid for too long until only a tip of the wire was in contact with the acid. Fessenden noticed that, with the wire in the acid, the barreter was very sensitive to nearby continuous radio waves.
Fessenden called his invention a liquid barreter, but it became known as an electrolytic detector. The detector consisted of several connected parts forming an electric circuit. A silver-coated platinum wire was dipped into a small platinum cup filled with nitric or sulfuric acid and connected to the ground. A battery was connected between the wire and the acid, prompting a current to flow in the detector. Someone wearing headphones that were hooked up to the detector could hear a hissing noise, which could be adjusted by turning a dial until the hissing noise stopped. At that point, the detector was highly sensitive to incoming radio waves.
……
新東方·新托福考試專項進階:高級閱讀 epub pdf mobi txt 電子書 下載 2025
新東方·新托福考試專項進階:高級閱讀 下載 epub mobi pdf txt 電子書新東方·新托福考試專項進階:高級閱讀 mobi pdf epub txt 電子書 下載 2025
新東方·新托福考試專項進階:高級閱讀 epub pdf mobi txt 電子書 下載非常好啦!!!挺適閤我這種剛入手托福的渣!!!
評分僅1988~1989年度,全世界就有56萬多人參加瞭TOEFL考試,全球170多個國傢和地區共設立瞭1700多個TOEFL考試中心。至今為止,美國和加拿大共有2300多所院校規定,凡是外國學生申請到該校入學學習的,必須提供T0EFL,GRE,GMAT或TSE的某一項或兩項標準化考試證明,隻有達到學校所要求成績的報考者,纔能取得入學和申請奬學金的資格。除瞭美國、加拿大等大部分國傢的高等院校外,歐洲(如英國)、大洋洲(如澳大利亞、新西蘭)以及東南亞一些國傢和地區也都已承認TOEFL考試成績。近幾年來,國內的聯閤國駐華機構和外企及閤資企業在聘錄用職員時,或國際基金組織在測試職員的英語水平時,也都采用TOEFL考試成績。[2]
評分比初級口語內容晉階,問題和答案分開兩部分
評分“托福”譯自TOEFL,中國人稱為考“托福”。
評分托福考試的一本好書
評分印刷清晰,內容豐富,喜歡!
評分多背單詞既提高英語水平,又能活動大腦
評分其實不是今年考托福,但是看有活動就買瞭,希望考好
評分自己復習托福還可以
新東方·新托福考試專項進階:高級閱讀 epub pdf mobi txt 電子書 下載 2025