焊接接头包括（），（）和（）三部分。_爱下问搜题

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问题填空题

焊接接头包括（），（）和（）三部分。

答案

参考答案：焊缝；熔合区；热影响区

多项选择题

患者男性，75岁。诊断为慢性呼吸衰竭，给予控制性吸氧后，病情反而加重，PaCO70mmHg，导致氧疗失败的原因有（）。

A.氧浓度太低

B.气道有阻塞

C.心力衰竭

D.氧中毒

E.有严重的贫血

完形填空

You must know the “ding dong ditch”. Person A rings Person B’s doorbell, and then quickly runs away or hides before Person B answers. Person B hurries to answer the door, only to find that no one’s there. After the 1 thing is repeated several times, this is called “ding dong ditch”.
Sharon Mardis, a single mother of four, told ABC News that she 2 a “ding dong ditch” when she 3 to her door at 1:00 am last night.
“My doorbell started ringing, 4 I came to the door,” Sharon told ABC News. “There was 5 at the door. I went back in the house. I got ten or twenty 6 and the doorbell started ringing again. I came back to the door, still nobody at the door.” She got 7 and stepped outside, shouting, “Who’s that? What on earth are you going to do?” There was just 8 .
But after Sharon returned to the house, she 9 something. Smoke! Sharon quickly 10 her kids and the family pets and ran out of the house. Only then did she 11 how bad the fire was. The 12 of the house fell down; the house was quickly 13 by flames. The smoke detectors(探测器) had never 14 : they were out of batteries. Good thing for the doorbell.
The 15 is who had rung it. 16 found that the flames has fused(熔化) the wires of the doorbell together, causing it to ring. But 17 , the fire had nothing to do with the doorbell wiring at all. It had started in the bathroom, well down the hall. From there, the flames didn’t spread to the nearby 18 , where the children and Sharon were sleeping. 19 , they surprisingly reached the doorbell first, making it ring repeatedly, and 20 Sharon to avoid danger.
Sharon believes it happened that way thanks to an angel.

A．experienced

B．centimeters

B．Firefighters

A．fortunately

B．encouraging