问题
选择题
镁等活泼金属可以在二氧化碳中剧烈燃烧，金属钠遇水可能会发生爆炸，它们都不与煤油反应，有的还可以保存在煤油中．试推测比镁、钠都活泼的金属钾着火，可以用作灭火剂的是（ ）
A．水
B．干冰
C．黄沙
D．煤油
答案
答案：C
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镁等活泼金属可以在二氧化碳中剧烈燃烧，金属钠遇水可能会发生爆炸，它们都不与煤油反应，有的还可以保存在煤油中．试推测比镁、钠都活泼的金属钾着火，可以用作灭火剂的是（ ）
A．水
B．干冰
C．黄沙
D．煤油
答案：C
| 完形填空。 | |||
| Look at the picture. It's a picture 1 a park. 2 the tree 3 some birds. Are there 4 boys under it? Yes, there are. They're 5 English books. 6 girls are there near the river? There're six. Are they 7 games? Yes, they are. 8 that girl behind the tree? That's Kate. She's 9 a red skirt. She's 10 tea. | |||
| ( )1. A. about ( )2. A. Away ( )3. A. have ( )4. A. a ( )5. A. reading ( )6. A. Who're ( )7. A. running ( )8. A. What's ( )9. A. putting ( )10. A. eating | B. of B. Down B. are B. any B. seeing B. How much B. think B. Who's B. having B. cleaning | C. to C. At C. there're C. some C. looking at C. How many C. playing C. How is C. wearing C. drinking | D. at D. In D. there's D. the D. watching D. What about D. makes D. Where's D. putting on D. like |