在关闭碳二加氢反应器旁路的同时,必须确保同时打开反应器进料和出料,防止()。A.裂解

题型:单项选择题

问题:

在关闭碳二加氢反应器旁路的同时,必须确保同时打开反应器进料和出料,防止()。

A.裂解气压缩机喘振

B.反应器飞温

C.反应器出口不合格

D.裂解气压缩机出口超压

考点:乙烯装置操作工乙烯反应器系统乙烯反应器系统题库
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海关对出现报关单填制不规范、报关行为不规范、以及违反海关监管规定或者有走私行为未被海关暂停执业、撤销报关从业资格的报关员予以记分、考核。()

题型:单项选择题

下列关于胃的描述正确的是()

A.成人胃的容量为2000ml

B.入口为幽门

C.食管末端左侧与胃底形成的锐角叫角切迹

D.胃的远端连接空肠

E.贲门位于第11胸椎体左侧

题型:单项选择题

I got a job teaching special education at a school in Coachella, California, a desert town about 170 miles from home. It was no (1) job. Street gangs (2) around the school after dark.

"Be careful, " Dad warned me during one of my frequent weekend (3) home. He was concerned about my living (4) , but I needed to be on my own.

One evening, I stayed after school to rearrange my classroom. (5) , I turned out the light and closed the door. Then I (6) toward the gate. It was (7) ! I looked around. Everyone had gone home.

After (8) all the exits, I found just enough (9) to squeeze under a gate in the back of the school. Then I walked toward my car, parked in a field behind the building.Suddenly I heard voices. I (10) around and saw at least eight boys following me. (11) my pace, I reached into my shoulder bag to get my key. I (12) all over the inside of my handbag. But the key wasn’t (13) ! Dear Lord, please help me, I prayed (14) . Suddenly, my fingers touched a loose key in my purse. I didn’t even know if it was for my car, but I took it out and (15) it. It worked!I opened the door, slid in and locked it—just (16) the teenagers surrounded the car. Trembling , I started the engine and (17) away. When I returned to my apartment, the phone was ringing. It was my Dad. I didn’t tell him about my experience; I didn’t want to (18) him. "Oh, I forgot to tell you!" He said, "I had a (n) (19) car key made and slipped it into your purse—just (20) you ever need it.

16()

A.as 

B.after 

C.until 

D.while

题型:单项选择题

民办非企业单位董事会的组成、负责人的任免,应由()确定、办理。

A.民办非企业单位按组织章程

B.政府登记部门

C.政府业务主管部门

D.三者都可以

题型:单项选择题

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