理工類教程匯總和更新

　　1. Formulated in 1823, the Monroe Doctrine asserted that the Americas were no longer open to European coloniz... [查看全文]

　　2017年職稱英語(yǔ)考試<理工C級(jí)>詞匯選項(xiàng)試題及答案　　1.We need to extract the relevant financial data.　　A, store　　B. ... [查看全文]

　　Characteristics of Publicity　　Publicity offers several benefits. There are not costs for message time or space... [查看全文]

　　By the time the Montgomery Improvement Association chose the 26-year-old Martin Luther King Jr. as its leader,... [查看全文]

　　The Visually Impaired Person　　Visual impairment (損害) carries with it a reduced or restricted ability to tra... [查看全文]

　　Winged Robot Learns to Fly　　Learning how to fly took nature millions of years of trial and error—but a wi... [查看全文]

Mobile phones should carry a label if they proved1 to be a dangerous source of radiation, according to Robert B... [查看全文]

what if如果……將會(huì)怎樣，即使…又如何whether…or是…還是，不管…還是and yet可是，然而ever since從那時(shí)起，自那時(shí)以來(lái)ever so非常... [查看全文]

　　however，whereas，while，yet　　這組詞都含 而、然而、卻 等轉(zhuǎn)折的意思?！　owever： 然而、可是 語(yǔ)氣較弱, 聯(lián)接也較少松弛.... [查看全文]

下面每個(gè)句子中均有1個(gè)詞或短語(yǔ)劃有下劃線，請(qǐng)為每處劃線部分確定1個(gè)意義最為接近的選項(xiàng)。1.I remember him. He did some marvelous... [查看全文]