问题 单项选择题

在对某中学的学生进行的一项测试中发现,每天连续使用电脑3~4小时,持续60天不间断的学生,经医学检查,有80%的人出现了视力退化。并且具有很高可信度的试验已经排除了“这些结果是碰巧发生的”这一个可能性。
假如题干中的信息是真的,则会证实下面哪一个结论( )

A.长时间连续使用电脑会导致视力退化
B.使用电脑与青少年的视力退化呈明显的相关性
C.研究者试图证明年轻人不应该长时间使用电脑
D.学习成绩与长时间使用电脑以及视力退化之间没有必然联系

答案

参考答案:B

解析: 通过实验证明,大部分连续长时间使用电脑的中学生,视力都出现了退化的现象。但不能说长时间连续使用电脑是导致视力退化的原因,A项说法太绝对,不一定为真。B项准确地概括了题干试验所证明的问题,是正确答案。C项是实验目的,是猜测的内容,不能从题干中推出。D项中的“学习成绩”是题干中没有提及的无关内容,因此D项也不能推出。故本题选B。

填空题
单项选择题

Strange things have been happening to England. Still (1) from the dissolution of the empire in the years (2) World War Ⅱ, now the English find they are not even British. As the cherished "United Kingdom" breaks into its (3) parts, Scots are clearly (4) and the Welsh, Welsh. But who exactly are the English What’s left of them, with everything but the (5) half of their island taken away

Going back in time to (6) roots doesn’t help. First came the Celts, then the Romans, then Angles, Saxons, Jutes, Danes. Invasion after invasion, until the Norman Conquest. English national identity only seemed to find its (7) later, on the shifting sands of expansionism, from Elizabethan times onwards. The empire seemed to seal it. But now there’s just England, (8) of a green island in the northern seas, lashed by rain, scarred by two (9) of vicious industrialization fallen (10) dereliction, ruined, as D.H. Lawrence thought, by "the tragedy of ugliness," its abominable architecture.

Of all English institutions, the one to (11) on would surely be the pub. Shelter to Chaucer’s pilgrims, home to Falstaff and Hal, throne of felicity to Dr. Johnson, the pub- that smoky, yeasty den of jollity-is the womb of (12) , if anywhere is. Yet in the midst of this national (13) crisis, the pub, the mainstay of English life, a staff driven (14) into the sump of history, (15) as the Saxons, is suddenly dying and evolving at (16) rates. Closing at something like a rate of more than three a day, pubs have become (17) enough that for the first time since the Domesday Book, more than half the villages in England no longer have one. It’s a rare pub that still (18) , or even limps on, by being what it was (19) to be: a drinking establishment. The old (20) of a pub as a place for a "session," a lengthy, restful, increasingly tipsy evening of swigging, is all but defunct.

10()

A.from

B.out

C.away

D.into