问题 单项选择题

最新一项研究显示,如今已成为亚洲人饮食主要组成部分的美味糯米,是使中国古代一种砂浆性能超强的主要因素。研究人员还发现,这种砂浆仍然是现存修复古代建筑的最好材料。
砂浆是一种用于填充砖块、石块和其他建筑材料之间缝隙的糊状物。中国科学家研究发现,距今大约1500年前,古代中国的建筑工人通过将糯米汤与标准砂浆混合,发明了超强度的“糯米砂浆”。
糯米砂浆或许是世界上第一种使用有机和无机原料制成的复合砂浆。糯米砂浆比纯石灰砂浆强度更大,更具耐水性,建筑科学家还认为它是历史上最伟大的技术创新之一。建筑工人利用糯米砂浆去修建墓穴、宝塔、城墙,其中一些建筑存在至今。有些古建筑物非常坚固,[ ]现代推土机都难以推倒,还能承受强度很大的地震。
最新研究发现了_种名为支链淀粉的“秘密原料”,似乎是赋予糯米砂浆传奇性强度的主要原因。支链淀粉是发现于稻米和其他含淀粉食物中的一种多糖物或复杂的碳水化合物。
分析研究表明,古代砌筑砂浆是一种特殊的有机与无机合成材料。无机成分是碳酸钙,有机成分则是支链淀粉。支链淀粉来自于添加至砂浆中的糯米汤。此外,砂浆中的支链淀粉起到了抑制剂的作用:一方面控制硫酸钙晶体的增长,另一方面生成紧密的微观结构,而后者应该是令这种有机与无机砂浆强度如此之大的原因。
为确定糯米能否有助于建筑物修复,研究人员准备了掺人糯米数量不同的石灰砂浆,对比传统石灰砂浆测试了它们的性能。科学家说:“对于这两种砂浆的测试结果表明,掺入糯米汤的石灰砂浆的物理特性更稳定,机械强度更大,兼容性更强,这些特点令其成为修复古代石造建筑的合适材料。”这一研究结果刊登在最新一期的《美国化学学会杂志》上。

下面有关“糯米砂浆”的表述,与原文不符合的一项是( )。

A.是由糯米汤与标准砂浆混合后制成的,具有超强度

B.在糯米砂浆中,糯米汤比例与砂浆强度成正比

C.在强度与耐水性方面均超过纯石灰砂浆

D.用其修建的一些古建筑,存在至今,十分坚固

答案

参考答案:B

解析: 文章中没有提到糯米砂浆中糯米汤比例与砂浆强度的问题。且从常识来看,如果糯米汤的比例太大,标准砂浆比例太小,可能会造成整个糯米砂浆无法正常使用。所以“糯米汤比例与砂浆强度成正比”的说法从常识来看也是错误的。

单项选择题
单项选择题

Are teens and young adults more narcissistic (自恋的) today than in the past That’s the view of a California researcher who studies (1) people.

In her new book, The Narcissism (2) : Living in the Age of Entitlement, psychologist Jean Twenge of San Diego State University and (3) W. Keith Campbell of the University of Georgia say research shows (4) young people today have "narcissistic traits" than in (5) generations. Such traits, Twenge says, include a very. (6) and inflated sense of self, which is (7) by a preoccupation with MySpace, Facebook and YouTube.

"We’ve been on this self-admiration cultural (8) for a long time," Twenge says. (9) Twenge’s take on today’s young people isn’t universal. Studies by other researchers, including Canadian (10) Dr. Kali of the University of Western Ontario, have used the same data but found (11) results. "They put a different (12) on it," Kali says.

Twenge’s studies have found more narcissistic traits and a (13) rate of increase among college students today, but Kali found that students’ narcissism was (14) greater in 2006 than in 1976. Twenge’s most recent paper studied the same data as Kali--more than 20 000 college students from 2002 to 2007. (15) researchers used the Narcissistic Personality Inventory to measure narcissistic (16) and findings by both have been (17) in peerreviewed journals.

Twenge’s book (18) just a month after The Mirror Effect : How Celebrity Narcissism Is Seducing America, a book co-written by behavioral (19) Drew Pinsky, (20) suggested that a celebrity-obsessed culture is causing more narcissism.

17()

A.rejected

B.reported

C.accepted

D.published