问题
单项选择题
化学泡沫灭火原理是采用（）。
A、窒息法
B、隔离法
C、中断法
D、无法确定
答案
参考答案：A
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化学泡沫灭火原理是采用（）。
A、窒息法
B、隔离法
C、中断法
D、无法确定
参考答案：A
| 完形填空。 | |||
| Think back to a time in your life when you tried something new. Being a teenager, I volunteered to give out water at a marathon(马拉松) Watching the different l _ who caught a cup was exciting. The next year I was told about the race. I did little preparation. My only goal was to 2 _. I remember by about the 5th mile, thinking "Never again!" Have you ever felt that way about something? You choose a goal hut soon realize it is 3 than you imagined. Then the most important 4 came. Near the end, an old man ran _5 me, I felt I failed, then I understood something.He was running his race and I was running 6 . How often in life do we compare ourselves to others and feel disappointed when we really 7 ? I decided that I wouldn't give up running. As I 8 the finishing line, I was proud of myself. Today it is a most joy in my life. It's natural to compare 9 _ sometimes. Don't allow those moments to make you _ 10 _. Let them encourage you. If you don't win the race, but you get the lesson, and grow, you're truly a winner. | |||
| ( )1. A. swimmers ( )2. A. finish ( )3. A. taller ( )4. A. day ( )5. A. with ( )6. A. yours ( )7. A. shouldn't ( )8. A. passed ( )9. A. next to ( )10. A. weak | B. runners B. win B. shorter B. race B. past B. my B. mustn't B. took B. face to face B. strong | C. drivers C. jump C. harder C. moment C. through C. his C. can't C. crossed C. in turn C. wet | D. workers D. watch D. easier D. person D. across D. mine D. wouldn't D. raised D. each other D. slow |