在燃烧区撒土和沙子是（）灭火。 A.抑制法 B.隔离法 C.窒息法 D.冷却法 发布时间：2019-02-22 19:45 │ 来源：www.tikuol.com 题型：单项选择题 问题： 在燃烧区撒土和沙子是（）灭火。A.抑制法B.隔离法C.窒息法D.冷却法
题型：单项选择题 （2009广东省珠海一中 深圳宝安中学 深圳实验学校三校第二次联考）下列变化中证明硫酸是强酸的是（ ）A．和铜反应B．和锌反应放出H2C．与NaCl反应制HClD．与Ca3(PO4)2反应制H3PO4 查看答案
题型：单项选择题 完形填空 It's a small gas station that has snacks, drinks, cigarettes, and candies. The young man behind the counter knows his 1 by name and what they normally want to buy. He treats children and adults with equal 2 . He reads science fiction behind the counter when business is 3 . One day, three people rushed in and grabbed food off the shelves as fast as they could, 4 not intending to pay for it. He hit the "panic button" , then went over the counter and 5 the front door. It was obvious that they were homeless, and equally obvious that they weren't going 6 with their illgotten gains. They 7 the food and simply crowded together in panic-knowing the police were 8 the way. Imagine what they must have felt like when they were told they didn't have to steal if they were that 9 . "We have food in the back, expired (到期)but still 10 to eat. If you need food, you 11 have some." They were told to 12 what they had dropped and put it back, and then asked to straighten out the mess. They were doing just that 13 the police arrived. The officers were told the situation was under control and the police were no longer 14 . This wasn't what they had 15 . They were being treated as human beings who could right the wrong they'd done. Shocked, they quickly followed orders to take turns and use the restroom to clean up. Soon three 16 people walked out with all the 17 their arms could hold. They were 18 that, if they needed to come back again, they were to ask and not just grab. And then the young man went back to read until the next customer came in. He would be the 19 person in the world to claim he was a hero. But he gave three people something they were in desperate need of-a 20 amount of selfrespect and a little bit of hope.( )1. A. friends ( )2. A. respect ( )3. A. slow ( )4. A. bravely ( )5. A. opened ( )6. A. nowhere ( )7. A. hid ( )8. A. in ( )9. A. anxious ( )10. A. safe ( )11. A. must ( )12. A. hold up ( )13. A. when ( )14. A. popular ( )15. A. wanted ( )16. A. dirtier ( )17. A. money ( )18. A. reminded ( )19. A. first ( )20. A. large B. neighbors B. pride B. busy B. reasonably B. locked B. somewhere B. lifted B. on B. cautious B. easy B. can B. hand out B. after B. necessary B. desired B. cleaner B. cigarettes B. warned B. last B. fair C. customers C. wisdom C. heavy C. hardly C. closed C. anywhere C. swallowed C. off C. courageous C. sweet C. should C. pick up C. before C. reliable C. expected C. cleverer C. drinks C. ordered C. best C. small D. passengers D. privilege D. swift D. obviously D. broke D. everywhere D. dropped D. by D. hungry D. unique D. need D. hand in D. since D. important D. admired D. quicker D. food D. persuaded D. worst D. full 查看答案
题型：单项选择题 关于标准及方法选用以下描述正确的是（）A.国家标准与行业标准均现行有效，行业标准未引用国家标准时，优先选用行业标准B.行业标准引用国家标准，国家标准已修订，行业标准未修订时，优先选用国家标准C.根据判定依据选择试验方法D.优先选用最新发布的标准 查看答案