如何清理V4003底部筛网？
参考答案：
（1）关闭筛网上部的XV阀
（2）关闭筛网下部的XV阀
（3）在打开手孔前，用氮气吹扫置换，检测无烃类
（4）缓慢打开手孔，除去块料
（5）关闭手孔，用氮气吹扫置换，避免氧气进入V4003底部
（6）打开筛网下部的XV阀
（7）打开筛网上部的XV阀
（8）检查V4003的料位是否下降
注意：如果正在生产钛系，需先用CO2进行置换，除去TEAL。
| 一般资料：女性，24岁，未婚，出纳员。 求助者自述：近两年来，总感到哪里都脏，尤其是钱，所以反复洗手，把手都洗脱皮了也．不行，知道这样不好但就是控制不住。 案例介绍：求助者十年前有一次去医院看同学，回家没有洗手就吃苹果。被父母发现后训斥，告诉她不洗手就吃东西会得病的，为此心里担心害怕失眠了两天。从此以后，每次放学回家，都要认真洗手，这事就过去了。两年前当了出纳员，每天与钱打交道，总觉得钱不干净，上面有多少细菌啊，所以下班后反复洗手，明知已经挺干净了，可还是控制不住，否则就心慌，总担心“万一没洗干净呢”，很耽误时间，为此十分苦恼，以至于近来无法上班，一个月前，开始担心自己会得精神病，情绪低落，失眠，经常头痛，反复看病就医，但又不愿吃医生开的药，因为说明书上说有很多副作用，父母觉得女儿没有精神病，陪她来做心理咨询。 求助者父母反映：求助者是独生子女，家里管教很严，小时候不让她自己出去玩。因父母工作忙，把她送到外婆家看养，外婆对她保护得很厉害，不许她与其他的小朋友玩，每天按时吃饭睡觉。上学后，学习很认真，成绩优良，同学关系一般，听父母的话，做事很认真，比较胆小，大学毕业考研究生失败后，情绪一度低落，睡眠不好，参加工作后较顺利，当出纳员，每天与钱打交道，总以为钱脏，洗手的次数越来越多。近来情绪低落，无法上班。 |
求助者的症状主要有( )。
A．恐惧情绪
B．抑郁情绪
C．强迫观念
D．强迫行为
| It sounds like a science fiction, but researchers say it’s a scientific fact: Microscopic organisms dubbed "killer algae" are paralyzing fish with unknown toxins and then eating away at their flesh. They might be making people sick, too. The name given to this single-cell organism, or dinoflagellate, is Pfiesteria piscimorte—literally, "fish killer." It was discovered at North Carolina State University in 1988, but at the same time, few scientists believed in its existence, much less in its highly unusual predatory nature. But ongoing research has led to international acknowledgment of the phenomenon and, recently, research funding. Seemingly prompted by an unknown substance secreted by fish, the aggressive creature swims into action. It sends neurotoxins into the water and air, paralyzing a fish’s nervous system, and causing it to gasp for air at the surface. Eventually the fish suffocates. The killer dinoflagellate then attaches itself to the fish and begins sucking away at its flesh. This macabre scenario may help solve several sea mysteries, such as why fishermen report seeing "fish walks" (fish trying to leave the water) and pools of dead fish with holes eaten through them. Whether humans are affected by the dinoflagellate’s toxin remains to be seen. Researchers think it’s unlikely eating fresh fish are in danger, but anyone with frequent exposure to the creature could be in peril. Several researchers working with the algae have reported bouts of memory loss and disorientation. To understand the killer algae further, scientists must fully characterize their toxin and determine what stimulates them to attack. They also need to know if the algae are hurting fish populations, and whether pollutants make them more likely to attack. |
Which of the following does the writer explain
A．Neurotoxins.
B．Microscopic organisms.
C．Predators.
D．Fish walks.