题目内容

【题目】大理岩是由那一种岩石变质形成的:

A. 玄武岩 B. 花岗岩 C. 页岩 D. 石灰岩

【答案】D

【解析】三大类岩石的比较表

分 类

形成过程

典型岩石

岩浆岩

侵入岩

岩浆在地下压力作用下侵入地壳上部,冷却凝固而成。

花岗岩

喷出岩

岩浆在地下压力作用下喷出地表,冷却凝固而成。

玄武岩(有气孔)

沉积岩

裸露地表的岩石在外力作用下被风化成碎屑物质,再经风、流水等外力搬运、沉积,经过压紧固结作用而形成的岩石。其典型特征是具有层理构造、常含有化石。

石灰岩、页岩、砂岩、砾岩

变质岩

原有岩石在地壳深处承受着高压,并受到岩浆活动、地壳运动产生的高温作用,岩石的成分和性质发生改变,形成新的岩石。

石灰岩变质为大理岩、页岩变质为板岩、花岗岩变质为片麻岩

大理岩是由石灰岩变质而形成的。所以本题选择D选项。

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【题目】 (共5小题;每小题2分,满分10分)

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。

How can a teen set themselves up for success? Here are some important points that you may find helpful.

Figure out your goals in life and work toward them. Start thinking about careers you would like to be in, but make a good choice based on your interests and strengths. 1 You could also work towards non-career related goals, such as creating your own fundraiser, getting good grades in school, joining in a team sport, etc. Challenge yourself and you’ll be surprised at what you can accomplish!

Don’t get into any trouble, legal or otherwise. It could ruin your future plans. Avoid the peer pressure and keep away from the cigarettes, alcohol, and drugs. 2 If you’re being pressured into anything, walk away. If you can avoid these things during your teen years, they’re a lot easier to avoid once you’re out of high school and away from peer pressure.

Have good friends to help you out! 3 Be with people who make you happy. Create a group of supportive, loving friends that can help you succeed in life and live your dreams. Find a few really good friends that will stick with you once you leave high school.

4 Join a sports team at school or out of school. Take your dog for a nice, long walk. Join a yoga group, go swimming at the local recreation center, or do sit-ups during commercial breaks on TV! Just exercise! 5 Studies show that people who are actively involved in activities in their teen years will be more active when they’re adults.

A. Get active!

B. Go for a run around your neighborhood.

C. This could be your job for the rest of your life!

D. You will start forming your own ideas this way.

E. It helps you feel better, mentally and physically.

F. Friends are there to support you and lift your spirits.

G. Obey the law and avoid ending up in the back of a police car.

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