问题 问答题 简答题

简述锅炉的并汽操作步骤。

答案

参考答案:

①开启主汽管道或集汽包上的疏水阀进行疏水暖管。②待放出蒸汽时关闭疏水阀,暖管30m1n。③正确冲洗水位计一次。④开启连续排污阀。⑤锅炉保持低水位,使锅炉汽压低 蒸汽母管0.02-----0.05MPa。⑥缓慢开启主汽阀。⑦在压力相等时完全开启主汽阀。

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“Oh please God, no, no!” Stephen Eldredge cried out when he saw his wife, Shelli, badly wounded on the side of the road. She had broken actually every long bone in her body, along with her pelvis, jaw, and cheekbones. He was terrified his bride would bleed to death.

Stephen and Shelli had married just six months before near their home in South Jordan, Utah. They were in Hawaii on a family vacation with two of their sons. The family had rented electric motors and headed towards a nature preserve near Waikiki. But Shelli had fallen behind and the family turned back to make sure she was okay.

Shelli lost so much blood that her heart couldn’t function properly and she went into shock at the hospital. Physicians were able to make her come to herself. On the first and second days there, she lived through half a dozen operations. On day three, the worst of Stephen’s fears came true. Shelli didn’t wake. She had shown heart failure and lung failure. “I thought every heartbeat would be her last,” Stephen says.

As days passed with no change, one doctor gently asked if it was time to let Shelli go. An MRI(核磁共振)showed her brain didn’t have much chance of supporting life. Stephen couldn’t bear the thought of trapping his wife’s beautiful spirit in a body that would never work. If he kept her alive, what kind of life would she have ? He called family, religious leaders, and physician friends in Utah for guidance.

And he decided there still was a chance.

The family moved Shelli to a Utah hospital closer to home. In the next few weeks she started opening her eyes, but it wasn’t entirely clear how conscious she was. Nearly seven weeks after the accident, Stephen was joking with his sister in the hospital room when he saw Shelli smile, a big toothy grin. “Did you understand that?” he asked. She smiled again. Stephen fell to his knees in thanks.

Shelli’s recovery has been slow but steady. Initially, she couldn’t remember much of the previous months, including her own wedding. Shelli has endured 17 operations so far and may require more surgery. She will definitely need more months of recovery. But she is able to walk. “She’s got her life back. She’s able to love and be loved, and be the person she was.” Elovie says.

When Shelli hears about each step in her recovery, she calls it “miracle after miracle”. As for his experience, Stephen says, “This is a story of fear that was slowly replaced by faith.”

小题1: We learn from the first two paragraphs that           .

A.Stephen and Shelli left home to hold the wedding ceremony.

B.Shelli was mainly wounded in the back

C.the couple were in Hawaii when the accident happened

D.the accident happened on their way to Waikiki小题2: In the hospital room Shelli smiled for the first time after the accident because      .

A.she liked people telling jokes.

B.she had remembered all that had happened

C.she was excited that she got her life back

D.she understood the joke being talked about小题3: By saying “miracle after miracle”, Shelli means that         .

A.she suffered what a terrible accident

B.she appreciated the care of her husband so much

C.the love for her family got her life back

D.it really surprised her that she survived so many operations小题4:. After reading the passage, what impresses us most may be that.

A.Stephen’s not giving up

B.the doctor’s skill and hard work

C.Shelli’s bravery and persistence

D.the couple’s faith