问题
单项选择题
清扫过程中如发现煤粉仓内残留的煤粉有（）现象时，清扫人员应立即退到仓外，将煤粉仓严密封闭用蒸汽或二氧化碳灭火。
A.自燃
B.着火
C.爆炸
答案
参考答案：A
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清扫过程中如发现煤粉仓内残留的煤粉有（）现象时，清扫人员应立即退到仓外，将煤粉仓严密封闭用蒸汽或二氧化碳灭火。
A.自燃
B.着火
C.爆炸
参考答案：A
| 阅读理解。 | ||
| ||
| 1. Peter's study group meeting will be on ______. | ||
| A. Sunday morning B. M  onday afternoonC. Saturday evening | ||
| 2. From Peter's plan we learn that Peter likes ______. | ||
| A. music B. art C. basketball | ||
| 3. On Sunday morning Mary will ______. | ||
| A. be free B. be busy C. see the doctor | ||
| 4. What will Mary do on Wednesday evening? | ||
| A. Play basketball. B. Go to her art class. C. Prepare for an exam. | ||
| 5. On Wednesday Peter will ______. | ||
| A. see some friends B. go shopping C. play basketball |