当有汞(水银)溅失时,应如何处理现场?
A. 用拖把拖
B. 倒上硝酸与其反应生成硝酸汞
C. 不用处理,待其自然挥发
D. 将溅落的汞收集到瓶中,并用水覆盖,再用硫磺粉撒在污染处,并保持通风,数天后用毛刷收集到瓶中
以下关于酒精灯的操作可能造成实验室内发生火情的是(不定项选择)
A. 添加酒精超过2/3
B. 用燃着的酒精灯点燃其他酒精灯
C. 吹灭酒精灯火焰
D. 精灯加完酒精后,未擦拭溅落在灯口的酒精
Fill in the blanks with the words given below. Chanege the form where necessary. Each word can be used only once.transform access estimate sophisticated indispensable inferior focus competitive compensate portable1. In order to maintain their_______ advantage and attract students, colleges are competing with the best Internet services.2. The college today is being_______ into a new age of electronics by laptops, smartphones and Internet connection 24 hours a day.3. _____to up-to-date information is essential to our research.4. A company should increase salaries to _____the workers if it decreases health benefits for its employees.5. We're going to_____ our attention on the worst case.6. Everyone with a ______device has once logged on to a public WiFi network without paying for it, while they are having a coffee, on a train, in a shopping mall or at a hotel.7. The government has ______emergency plans for natural disasters.8. It is difficult to ______ how many people had been wounded in the food.9. Digitization has made data a/an_____ resource for any enterprise .10. The Apple maps app has been widely considered as _____to Google maps.
权威只要和信息内容之间存在利益关系,那么权威所提供的信息就不可以轻易相信。()
A. 对
B. 错