C.professional and vocational careers are unrelated

D.sorted students can hardly change schools

60.The examples in Paragraph 6are used mainly to illustrateB.

A.a good language learner promises to be good at maths

B.a student might join different groups for different courses

C.ability grouping benefits gifted students more than slow ones

D.ability grouping presents no challenge for those slow students

61.What might be the challenge in regular classrooms for teachers?A

A.Students'different levels.

B.Students'low performance.

C.Constant self﹣comparison.

D.Application of not﹣so﹣secret code.

【考点】科教类阅读.

【分析】本文属于说明文阅读，作者通过这篇文章向我们说明了如今很多学校依然根据学生的能力对他们进行不同的分组，这虽然对他们的学习有益，但是这种分组却一直存在争议，作者在文中讨论了这样分组的好处以及缺点.

【解答】58.C 细节理解题，根据第五段Unlike tracking，which means sorting students into separate classrooms，ability grouping happens within classrooms.When done according to the latest research，it has proven to promote achievement.可知学生根据他们的能力分组再次流行是因为它在学术上对不同能力的学习者是有益的，故选C.

59.D 推理判断题，根据第三段Children are tested and placed in different schools that direct them toward professional or vocational careers.Movement between the tracks is rare.可知作者说"Movement between the tracks is rare."是为了告诉我们给学生排序几乎不能改变学校，故选D.

60.B 细节理解题，根据第六段For instance，a student who stands out in language arts might be at an average or slower level in math.A student who flies through multiplication tables might need extra help with fractions.Students who lag in reading can be pulled out of the classroom in small groups for practice with a tutor until their reading improves.所提出的例子可知一个学生可能会加入不同的小组来学习不同的课程，故选B.

61.A 细节理解题，根据倒数第二段In many regular classrooms，the differences between student ability levels are very big.That presents challenges for teachers and low﹣performing students to constantly compare themselves with students who seem to fly through school with ease.可知教师在普通课堂上的挑战是学生能力水平之间的很大的差异，故选A.

【点评】考查学生的细节理解和推理判断能力.做细节理解题时一定要找到文章中的原句，和题干进行比较，再做出正确选择.在做推理判断题时不要以个人的主观想象代替文章的事实，要根据文章事实进行合乎逻辑的推理判断.

62.Microsoft just finished a three﹣month experiment operating an underwater data center.A server rack(服务器支架) with the power of about 300PCs was placed into a water﹣tight(防水) steel container and lowered into the ocean off the coast of central California.

The unusual experiment was launched because current data centers are unpleasantly inefficient.They're built where energy and land are cheap (not close to where people actually live).And they waste so much energy cooling their massive computers.The ocean can solve those problems.The cold ocean floor sufficiently cools the computing components inside the pod.And since most people live near the ocean，placing data centers under water could potentially increase the speed at which customers could access the information stored in Microsoft's cloud.

The experiment was so successful that Microsoft operated the underwater data center for 75days longer than it had planned to.The next step is to get a larger pod，with about four times the computing power，under the ocean for testing.Unlike the first experiment，the next pod will also be equipped with turbines，which will transform the ocean's currents into electricity.It's not clear when，if ever，underwater data centers will become a possible product."Our first experiment was like dipping our pinkie toe in the water，and now we're going for the big toe，"said Lee，corporate vice president of Microsoft Research.

Microsoft is still analyzing the environmental impacts of the study.Data centers are both hot and loud，which could have damaging effects on ocean life.Microsoft found that the noise its underwater data center produced was drowned out by nearby shrimp and crabs.The data centers are also built from recyclable materials，and Microsoft believes that the total carbon footprint of underwater data centers will be"dramatically lower"than current land﹣based centers.

Given the growth in the cloud，industry analysts believe that most of the world's data centers have yet to be built.But building a data center takes at least two years﹣an eternity in the fast﹣developing tech industry.As a result，Microsoft builds its data centers with the future in mind，installing far more computing power and space than it currently needs.

Lee believes that going under water can shift the building of data centers from construction projects to manufacturing jobs."What if we could mass﹣produce these pods on an assembly line?"he thought."We could deliver a data center，from conception to operation，in 90days.That's dramatically different than what's happening today."

62.What is the advantage of an underwater data center?D

A.It can be lowered to the ocean floor easily.

B.It can cool computing components automatically.

C.It can be built close to the place where people live.

D.It can make information easily accessible to people.

63.We can infer that the underwater data centersB.

A.cause little harm to the ocean life B.are more environmentally friendly

C.change the course of ocean currents D.are easy to build in large quantities

64.The underlined word"eternity"in Paragraph 5means"A".

A.an extremely long time B.an extended period

C.a seemingly short time D.a fruitful period

65.The passage tries to inform readers thatC.

A.an experiment was made in operating a data center

B.Microsoft will mass﹣produce pods on an assemble line

C.Microsoft succeeded in putting a data center underwater