根据施工现场机械设备检查技术规程-JGJ160-2008中3.3.12,开关箱中必须

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问题:

根据施工现场机械设备检查技术规程-JGJ160-2008中3.3.12,开关箱中必须安装漏电保护器,其相关要求以下哪些是正确的()

A.应装设在靠近负荷的一侧

B.应装设在靠近总开关的一侧

C.额定漏电动作电流不应大于30mA

D.额定漏电动作电流不应大于100mA

考点:监理知识竞赛监理安全知识监理安全知识题库
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只要我们走上了工作岗位,就获得了完全自立的能力。 [     ]

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四环素是牙周治疗的有效药物,其具有的特性是

A.服药后血清浓度低

B.在口腔的药效时间短

C.抗菌谱窄

D.抑制胶原酶的活性

E.防止胶原的附着

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正火工艺的目的之一是()。

A.减少工件的硬度和耐磨性,延长使用寿命

B.减少低碳钢中珠光体组织,提高硬度

C.消除铸、锻、焊、冷加工等所产生的内应力

D.消除中碳钢中网状碳化物,作为淬火前预先热处理

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阅读理解。

      We walked in so quietly that the nurse at the desk didn't even lift her eyes from the book. Mum pointed

at a big chair by the door and I knew she wanted me to sit down. While I watched, mouth open in surprise,

Mum took off her hat and coat and gave them to me to hold. She walked quietly to the small room by the lift

(电梯) and took out a wet mop (拖把). She pushed the mop past the desk and as the nurse looked up, Mum

nodded and said, "Very dirty floors."

      "Yes. I'm glad they've finally decided to clean them," the nurse answered. She looked at Mum strangely

and said,"But aren't you working late?"

      Mum just pushed harder, each swipe of the mop taking her farther and farther down the hall. I watched

until she was out of sight and the nurse had turned back to writing in the big book.

      After a long time Mum came back. Her eyes were shining. She quickly put the mop back and took my

hand. As we turned to go out of the door, Mum nodded politely to the nurse and said, "Thank you." 

      Outside, Mum told me, "Dagma is fine. No fever."

      "You see her, Mum?" 

      "Of course. I told her about the hospital rules, and she will not expect us until tomorrow. Dad will stop

worrying as well. It's a fine hospital. But the floors! A mop is no good. You need a brush."

1. When she took a mop from the small room, what Mum really wanted to do was ______. [ ]

A. to clean the floor

B. to make the nurse happy

C. to see a patient (病人)

D. to surprise the story-teller

2. When the nurse talked to Mum, she thought Mum was a ______. [ ]

A. nurse

B. visitor

C. patient

D. cleaner

3. After reading the story, what can we infer (推断) about the hospital? [ ]

A. It was a children's hospital.

B. It has strict rules about visiting hours.

C. The nurses and doctors there don't work hard.

D. A lot of patients come to this hospital every day.

4. Why did Mum go to see Dagma in the hospital? [ ]

A. To give her some messages about Dad.

B. To make sure her room was clean.

C. To check that she was still there.

D. To find out how she was.

5. Which of the following words best describes Mum?[ ]

A. clever

B. hard -working

C. warm -hearted

D. strange

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撤销要约时,撤销要约的通知应当在受要约人发出承诺通知前后的( )时间到达受要约人。

A.之前
B.当日
C.后五日
D.后十日

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