向人呼出气体中注入少许澄清石灰水，会发现______，此实验的目的是______，此变化属于（填“物理”或“化学”）______变化．
二氧化碳能使澄清的石灰水变浑浊，用澄清的石灰水进行实验来比较二者中二氧化碳含量的多少，向人呼出气体中注入少许澄清石灰水，会发现澄清的石灰水变浑浊，此实验的目的是检验呼出气体中是否含有二氧化碳；此变化过程中有新物质碳酸钙和水生成，属于化学变化．
故答案为：澄清的石灰水变浑浊；检验呼出气体中是否含有二氧化碳；化学．
| 阅读理解。 | |||
| It's a lifestyle choice More than a surfing lesson, it's a lifestyle. Welcome to a network of informed coaches, friendly staff and discounts through Surfing Queensland's surf school, Australia's leading surf chain schools. It's easier than you think Most people stand upon their first lesson. Getting the right advice from the beginning is the key. The best tuition Want to learn from the best? Try real surfers from the Australian Coaching Council to teach real surfing. Ask about the Australian Sports Commission's Safe Surfing Program. Over 40 years' experience Surfing Queensland has been teaching surfing and developing the sport for over 40 years. Fully insured surf schools with the latest in teaching methods. Just buying yourself and a towel All equipment is provided for you; specially designed soft surfboards, wet shirts, and plenty of laughs! Small classes Choose one on one, or share the fun with a group. Never more than 8 people per coach for maximum mention to detail. Surfing Queensland surf school
| |||
| 1. From the ad, we can know the exact information about _____. | |||
[ ] | |||
| A. the beginning date B. tuition C. the coaches' records D. class size | |||
| 2. Philips contacts 07-4959-2780. He most probably lives near _____. | |||
[ ] | |||
| A. Main Beach Southport B. Yeppoon C. Noosa Heads D. Bribie Island | |||
| 3. The main purpose of mentioning Surfing Queensland's history is to _____. | |||
[ ] | |||
| A. show its glorious past B. encourage surf learners C. attract surf learners D. prove its teaching methods | |||
| 4. According to the ad, which of the following is NOT TRUE? | |||
[ ] | |||
| A. Surfing Queensland surf school is surfing chain schools. B. The first lesson is very important for surf learners C. You don't have to bring a lot while learning surfing D. Sunshine Coast lies in Bribie Island | |||
| 5. We can most probably read the ad in _____. | |||
[ ] | |||
| A. the entertainment section of an Australian website B. the education section of an Australian website C. the entertainment section of a British newspaper D. the travel section of a British newspaper |