题目内容

【题目】若动画片《喜羊羊与灰太狼》中的喜羊羊,一天来到美丽的大蜀山,它突发奇想,从大蜀山遁地前往地球另外一侧去看看,如果它始终保持直线前进并穿越地心。据此回答下列问

【1】在喜羊羊穿越地心前,依次穿越的是(  )

A.地壳—地幔—地核—莫霍界面—古登堡界面

B.地壳—古登堡界面—地幔—莫霍界面—地核

C.地幔—莫霍界面—地核—古登堡界面—地壳

D.地壳—莫霍界面—地幔—古登堡界面—地核

【2】地球内部圈层的划分依据是(  )

A.地震发生时的地面变化

B.通过打深井而获得的信息

C.地震波传播速度的变化

D.通过地球卫星获得的信息

【答案】

【1】D

【2】C

【解析】

试题分析:

【1】在喜洋洋穿越地心前,即由大蜀山(地壳)穿越至地心(地核),依次穿越了:地壳莫霍界面地幔古登堡界面地核,故D正确。地壳、地幔、地核之间分别由两大界面分开,故A错。地壳与地幔之间的界面是莫霍界面而非古登堡界面。故B错。C中地壳、地核、地幔的顺序错误,故排除C。

【2】地球内部圈层的划分依据是由地震波传播速度的变化而形成不连续的界面进行划分,具体为:横波纵波在遇到莫霍界面时,传播速度突然增加;而横波和纵波遇到古登堡界面时,横波完全消失,纵波传播速度突然下降。故以莫霍界面和古登堡界面为分界面,地球内部圈层分为三层:地壳、地幔、地核。故C正确。地震发生时的地面变化只是反应地面现象,不能以此来划分地球内部圈层,排除A。通过打井获得的信息只是属于地壳部分,故B不合题意。通过地球卫星获得的信息只是地球的表面景观,无法探究到地球的内部圈层,故排除D。

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【题目】根据短文内容,从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。

Good study habits are what separate the good students from the average. It’s natural to not want to study,especially when there are video games to play, friends to chat with and TiVo to watch. 【1】 Besides, developing your concentration has its own reward in that it helps make you a calmer, smarter person for life. Read on to learn how.

【2】

If you find the right place and keep coming back to it, you will condition your brain to focus when the time comes to read the books. Find a place where you can spread out your materials. Any location you pick should be well lighted and quiet.

Minimize distractions, including cell phones, email and social networking sites.

Noise is okay if you need the sound of music or television in the background. 【3】 If you are distracted by shiny objects, keep your head down so you see only the page in front of you.

Use active reading techniques to keep your brain from wandering off.

Reading is as effective as the information you remember, so challenge yourself by asking questions as you go. Try looking away from the page and summarizing out loud what you just read. 【4】

Mix it up.

【5】 It’s natural to want variety so that you stay interested in what you are trying to learn. If you find a particular subject boring, sandwich it between two subjects you enjoy.

A.Pick a spot to study.

B.Choose a time to study.

C. If you need total silence, invest in earplugs.

D.After a good study session, you will enjoy all those activities even more.

E.Make notes on what you don’t understand and follow up with the instructor.

F.Let your treat be a chat with friends, a healthy snack, or even a night on the town.

G.Study one subject for an hour, take a break, and then continue with another subject.

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