问题 单项选择题

Everybody dreams. Some people think dreams can tell us about the future. Other people think dreams can tell us about ourselves. It’s like our (11) is talking to us.
Why are dreams (12) strange and hard to understand Some people think our brain uses (13) to talk to us. When we fly, swim, or fall down in our dreams, it has a (14) meaning. Lots of doctors help people (15) their dreams. They find that dreams tell us about our (16) and fears.
These days, many scientists (17) that dreams are very important. During the day, we have many (18) , and our brain receives a lot of information. When we dream, our brain (19) information that is not important, and puts the most important information into our (20) . As we learn more about the brain, we may find answers to our questions about dreams.

Ⅰ. 完形填空

/Close
阅读下列短文,从每小题所给的A、B、C、D四个选项中选出一个最佳选项。

A.symbols

B.examples

C.numbers

D.pictures

答案

参考答案:A

解析: symbol意为“符号,记号”;example意为“例子”;number意为“号码”;picture意为“图片”。根据句意故选A项。

判断题
问答题

199×年×月×日16时左右,某公司甲酸合成装置因故障全系统停车进行检修,合成反应器甲醇喷管坏,需进合成反应器内进行维修。×月×日上午8时左右,打开合成反应器下部两个人孔进行通风,并从上部人孔加水进行冲洗。下午17时左右,应公司安全处要求打开最上部人孔进行通风。17时15分左右,安全处有关人员用可燃气体及氧气测定仪测定可燃气体不合格。此后,在17时15分~19时45分左右的一段时间内,每隔 15min测定一次,19时45分左右经测定,氧气:21%;可燃气体爆炸极限百分比为: 12%~18%。安全人员认为合格,随后签发“进罐人塔证”,并注明要佩戴长管呼吸器。 20时左右,乙公司2名架子工进入器内进行扎架子作业,甲公司2名操作工及乙公司1名临时工在器外进行监护。由于不方便,2名架子工未戴呼吸器。大约13min后,塔内传出求救声,监护人员及现场6名检修人员情急之下未戴呼吸器进塔救人,先后中毒,有7人勉强爬出。最后甲公司经理及合成工段工段长戴上呼吸器将塔内4人救出,立即进行现场急救并及时送往医院进行的抢救,此时大约是20时40分左右。乙公司1名临时工经抢救无效后死亡,其余人员脱离危险。
根据以上内容回答下列问题。
1.该合成反应器存在哪些事故隐患
2.当合成反应器内人员呼救,监护人员及现场6名检修人员未戴呼吸器进塔救人说明了什么应急培训与演习的基本任务是什么
3.试分析此次事故的经验教训。