问题
选择题
下列岩石中，由外力作用形成的是 （ ）
A．花岗岩
B．玄武岩
C．石灰岩
D．大理岩
答案
答案：C
A项和B项都属于岩浆岩，是岩浆通过冷却凝固作用转变而来的；岩浆活动是内力作用的一种表现形式。D项是由C项经变质作用转变而成；变质作用也是内力作用的一种表现形式。答案为C项。
搜题请搜索小程序“爱下问搜题”
下列岩石中，由外力作用形成的是 （ ）
A．花岗岩
B．玄武岩
C．石灰岩
D．大理岩
答案：C
A项和B项都属于岩浆岩，是岩浆通过冷却凝固作用转变而来的；岩浆活动是内力作用的一种表现形式。D项是由C项经变质作用转变而成；变质作用也是内力作用的一种表现形式。答案为C项。
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| The Best Holiday I was unbelievably proud of my nine-year-old daughter, Emily. 1 to buy a mountain bike, she'd been saving her pocket money all year, as well as doing small jobs to earn extra money. By Thanksgiving , she had collected only $49. I said, " You 2 have your pick from my bicycle 3 ". "Thanks, Daddy. But your bikes are so old. " She was right. All my girls' bikes were 1950s models , not the kind a kid today would 4 choose. As Christmas 5 near, Emily and I went bike shopping . As we left one store, she 6 a Salvation Army volunteer standing next to a big pot. "Can we give something, Daddy?" She asked. "Sorry, Em, I'm out of 7 . " Throughout December, Emily continued to work hard. Then one day, she made a 8 announcement. "You know all the money I've been saving?" she said hesitantly. "I'm going to give it to the poor people. " So one cold morning before Christmas, Emily handed her total savings of $58 to a volunteer who was really very 9 . 10 by Emily's selflessness, I decided to contribute 11 of my old bicycles to a car dealer who was collecting used bikes for poor children. 12 I selected a shiny model from my collection, however, it seemed as if a second bike took on a glow. Should I contribute two? No, one would be enough. But I couldn't 13 the feeling that I should give a second bike. When I later 14 the bikes, the car dealer said, "You're making two kids very 15 , sir . Here are your tickets. For each bicycle contributed, we're 16 away one chance to win a girl's mountain bike. " Why wasn't I surprised when that second ticket proved to be the 17 ? I like to think it was God's way of 18 a little girl for a sacrifice 19 her year--while giving her dad a lesson in the 20 . | |||
| ( )1.A. Promised ( )2.A. need ( )3.A. collection ( )4.A. seldom ( )5.A. drew ( )6.A. observed ( )7.A. work ( )8.A. disappointing ( )9.A. agreeable ( )10.A. Moved ( )11.A. one ( )12.A. While ( )13.A. express ( )14.A. returned ( )15.A. sweet ( )16.A. putting ( )17.A. present ( )18.A. greeting ( )19.A. under ( )20.A. process | B. Amazed B. should B. contribution B. likely B. became B. sensed B. charge B. surprising B. hopeful B. Shocked B. some B. As B. describe B. delivered B. healthy B. giving B. harvest B. praising B. before B. project | C. Determined C. must C. shop C. slightly C. went C. watched C. time C. formal C. thankful C. Persuaded C. two C. Because C. explain C. chose C. happy C. storing C. winner C. sheltering C. beyond C. struggle | D. Organized D. can D. club D. merely D. pulled D. noticed D. change D. public D. pitiful D. Demanded D. any D. Though D. shake D. shared D. fair D. signing D. chance D. rewarding D. within D. communication |