【单选题】
如果实验出现火情，要立即：___
A. 停止加热，移开可燃物，切断电源，用灭火器灭火
B. 打开实验室门，尽快疏散、撤离人员
C. 用干毛巾覆盖上火源，使火焰熄灭
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答案
A
解析
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相关试题
【单选题】
实验大楼因出现火情发生浓烟已穿入实验室内时，以下哪种行为是正确的？___
A. 沿地面匍匐前进，当逃到门口时，不要站立开门
B. 打开实验室门后不用随手关门
C. 从楼上向楼下外逃时可以乘电梯
【判断题】
于触电事故，应立即切断电源或用有绝缘性能的木棍棒挑开和隔绝电流，如果触电者的衣服干燥，又没有紧缠住身上，可以用一只手抓住他的衣服，拉离带电体；但救护人不得接触触电者的皮肤，也不能抓他的鞋
A. 对
B. 错
【判断题】
实验室内应使用空气开关并配备必要的漏电保护器；电气设备应配备足够的用电功率和电线，不得超负荷用电；电气设备和大型仪器须接地良好，电线老化等隐患要定期检查并及时排除
A. 对
B. 错
【判断题】
国家秘密载体是指以文字、数据、符号、图形、图像、声音等方式记载国家秘密信息的纸介质、磁介质、光盘等各类物品。磁介质载体包括计算机硬盘、软盘和录音带、录像带等
A. 对
B. 错
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【单选题】
Q2: Where did J. K. Rowling come up with the idea for Harry Potter?___
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【单选题】
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【单选题】
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【单选题】
Q3: What did Stephen’s mother teach him later?___
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【单选题】
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【单选题】
Q2: Which age group would be the most likely to visit their friends and relatives?___
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【单选题】
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【单选题】
Q4: According to the survey, how are leisure activities related to age?___
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【单选题】
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【单选题】
Q3: Why did the man’s mom give him a big hug?___
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【单选题】
Q4: What color is the girl going to wear for her next competition?___
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【单选题】
Q2: According to the passage, what is considered as bad luck?___
A. Walking under a ladder .
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【单选题】
Q3: Why is it considered bad luck to see a black cat crossing one’s path?___
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【单选题】
Q4: According to the passage, what will bring people good luck?___
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【单选题】
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【单选题】
Q2: When does the woman arrive back home by subway?___
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【单选题】
Q3: According to the woman, in what way will the new high-speed train be a big help to her?___
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【单选题】
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【单选题】
Q2: What is the present situation about Americans’ commuting to work?___
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【单选题】
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【单选题】
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【单选题】
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【单选题】
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【单选题】
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【单选题】
Q2: Why did some stores open at midnight on Thanksgiving night?___
A. To attract young customers .
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【单选题】
Q3: How many Black Friday shoppers were reported to go to the shops at midnight this year?___
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【单选题】
Q4: What can we learn about the 15-year-old Jenny?___
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