根据对程序运行的统计，在一般时间内其程序的执行往往呈现出高度的局部性，这种局部性可能

线性方程组AX=β₁+kβ₂，其中

下列各句中，没有错别字的一项是（   ）

A．在省城试映会上，“侠盗”金城武果然生手不凡，但其落魄造型和时不时展现的魔术技巧，简直是“犀利哥”和刘谦的综合体，让不少观众大呼。

B．她们一窝蜂地挤拢来，每人盛了一碗，就四散地蹲伏或者站立在路上和门口吃。

C．由北京卫视和中粮集团强强连手打造的大型互动电视节目——《我要看世博》，自开播以来就备受关注，每到一站都引发了市民的高涨热情。

D．站在黄山顶上，眼观云卷云舒，耳听八面松涛，一切尘间扰攘、宠辱得失俱化为乌有。这境界多么让人留恋忘返，却又是如此的可望而不可即！

.

Some schools that are not year-round often have summer programs. In many cases, students take summer classes to repeat a subject they failed. This way they get a second chance to succeed. But schools also offer summer classes to students who want to be free of a required class during the next school year.

Generally, students in these classes want to take fewer subjects during the year because they are involved in a lot of activities. They might be involved in sports or music programs. Or both – and more.

These summer school students do the same amount of work as if they took the class during the school year. But they do it in a much shorter time, one or two months. They say it makes for a lot of reading and homework and not much time for anything else. Some education experts are worried about high school students who take summer school because of pressure to attend a top university.

The New York Times recently reported about summer classes at one of the best high schools in the United States. New Trier High School is in Winnetka, Illinois. Almost six hundred students are in school this summer. Only twenty are repeating classes that they failed. The others are in difficult courses like physics and history.

The students say taking classes like these in the summer means that they can take even more difficult classes next year. They say this shows not only that they are serious about their studies but that they have experienced the most difficult high school program.

Another place with a lot of students in summer school is Palo Alto, California. The Mercury News reported that about twenty percent of the students in the city schools are in class this summer. That is more than two thousand teenagers.

A third are in classes they failed before. The others are taking subjects they do not have time for during the normal school year.

But they are not taking subjects like physics and history. The students in Palo Alto are in classes like creative writing, film studies, literature and cooking.

63. This passage mainly talks about ______.

A. summer classes in American schools

B. why American schools offer summer classes

C. the advantages of American summer school

D. experts’ anxiety(担忧)about American summer school

64. Which of the following is NOT the reason for the students’ attending summer classes in America?

A.Repeating a subject.           

B.Completing a required subject ahead of time.

C.Improving their physical quality    

D.Learning some special skills

65. What’s the biggest difference between the summer classes in New Trier High School and in Palo Alto?

A.There are more students attending classes that they failed before in Palo Alto.

B.Some students in Palo Alto learn some special skills instead of taking physics and history.

C.Some students in Palo Alto take some subjects so that they can join in sports or music programs later.

D.The students’ attitude towards studies in Palo Alto is worse than that in New Trier High School.

66. What can we infer from the passage?

A.American students in schools don’t have any pressure to attend top universities.

B.Summer school students don’t do the same amount of work as they do during the school year.

C. American students attend summer schools in order to relax themselves very much.

D. American students in high schools face great pressure to attend top universities.

可引起男子 * * 女性化和妇女多毛症的药物是（）

A.甘露醇

B.螺内酯

C.呋塞米

D.糖皮质激素

E.氢氯噻嗪

我国的《公路沥青路面再生技术规范》建议水泥等活性填料一般不超过（）

A.1%

B.1.5%

C.2%

D.2.5%