考研考试

【单选题】According to myth, Rwanda’s ancient line of kings descended from a man with secret knowledge: He could (1) ordinary rock into smooth, gleaming iron. (2) this new technology, he taught his people to make hard, durable weapons for defeating their enemies and sharp axes for cutting the forest to make fields.By the time the firstEuropeans arrived in the 19th century, iron had become (3) in the kingdom of Rwand
A、
Other traditionalAfrican societies tell stories of (4) ironworkers who descended from heaven or came from other lands. The prevalence of such legends (5) the importance of ironworking in these cultures, and archaeologists have long wondered if the arrival of iron metallurgy (6) the growth of complex early societies.Did foreigners (7) bring ironworking toAfrica, or didAfricans invent it themselves
Entering the IronAge was not easy. Metalworkers had to melt ore at (8) temperatures and then repeatedly hammer and reheat the spongy metal. The traditional view is that metallurgists in Turkey were the first to melt iron ore (9) , beginning around 1800B、C、E、Initially, they (10) the new metal for precious (11) or ritual objects.But by 1200B、C、E、, workers in the Levant were boiling out (12) amounts of iron.
The metal had a major (13) on societies. Iron was a transformative metal. Iron ores are much more (14) than copper or the tin needed to make bronze.Bronze was (15) costly and largely limited (16) use in ritual objects and goods for (17) .But once cultures learned to melt iron, they could put iron tools into the hands of (18) people for clearing forests and tilling the (19) . This boosted agricultural yields, increased the numbers of villages, and (20) ever more social complexity.

A、minimum B、bioactiveC、preciseD、automatic
网考网参考答案：C
网考网解析：
语义逻辑题，考查词义辨析。该段第一句提到，进入铁器时代不容易。第二句讲的是制作工艺，包括温度的控制和制作方法。填入的形容词修饰temperatures，precise temperatures指“精确地温度”，C项放入句中符合句意和逻辑。 结合常识可以判断，冶铁不可能在低温或者自动温度下进行，而必须在精确的温度下进行，因此其他三项均不符合题意。 document.getElementById("warp").style.display="none"; document.getElementById("content").style.display="block"; 查看试题解析出处>>