问题 问答题

若A、B、C、D四种元素位于元素周期表中如右图所示位置,请回答以下问题:

(1)原子半径最大的是:______(填字母)

(2)非金属性最强的是:______(填字母)

(3)金属性最强的是:______(填字母)

答案

(1)电子层数越多,半径越大,则C、D的原子半径大于A、B,再由同周期元素从左向右,原子半径在减小,则C>D,A>B,显然原子半径最大的为C,故答案为:C;

(2)同周期元素从左向右非金属性在增强,则B>A,D>C,同主族元素从上到下,非金属性在减弱,则B>D,显然B的非金属性最强,故答案为:B;

(3)同周期元素从左向右金属性在减弱,则A>B,C>D,同主族元素从上到下,金属性在增强,则C>A,显然金属性最强的为C,故答案为:C.

阅读理解

When Harvard was founded in 1636, there were no other colleges in the American colonies, and it would become the model for many of those that followed. When it began requiring applicants to take a test known as the SAT in 1935, Harvard started another trend. Two years ago, after it announced an aggressive new financial-aid policy, it helped push social class to the center of the national debate over higher education and forced two of its main competitors, Stanford and Yale, to follow its lead.

Last week. Harvard began to make another effort to affect higher education in its image, its president, Derek Bok, announced that the college would abandon its early admissions program, which for decades has allowed high school seniors to apply in October and get an answer yes, no or maybe – in December, shortly before the regular deadline for applications.

Harvard officials argue that the program is beneficial to rich students who don't need to compare financial-aid offers from various colleges. After the announcement, many people within education urged other colleges to take a similar step.

"We're thrilled," said Laurie Kobick, a college counselor (顾问) at Thomas Jefferson High School for Science and Technology in Alexandria, Va. "I think it's going to make admissions better in so many different ways. It will indeed go a small way toward leveling the field among applicants. Of course, it will also have an effect on colleges, and the biggest winner will almost certainly be Harvard. a fact that may prevent many other colleges – perhaps all of them – from       following Hazard this time. Because any college that does so will risk losing some of its best applicants."

小题1:From the first paragraph we can learn that Harvard ____.

A.was the first college in the American colonies

B.was best known for the SAT

C.was muck better than Stanford and Yale

D.refused to offer financial-aid to applicants小题2:By abandoning early admissions program, Harvard wants ____.

A.to attract the public's attention

B.to influence higher education in its own way

C.to save money spent in attracting students

D.to allow its competitors to admit more students小题3:Early admissions program is good for rich students because ____.

A.they have more chances to enter college

B.they can enter college with a lower score

C.they have special right to be admitted into college

D.they have no problem in supporting their studies小题4:Why does Laurie Kobick think other colleges may not follow Harvard?

A.Because they think the action will harm high education.

B.Because they are afraid that the action is not practical.

C.Because they may attract fewer top students than he[ore,

D.Because they are afraid the action will damage their reputation.

单项选择题 A3/A4型题