焊料未能充满整个焊隙形成相互扩散的结合,只是在焊缝的外表面堆砌一部分焊料的现象叫作

题型:单项选择题

问题:

焊料未能充满整个焊隙形成相互扩散的结合,只是在焊缝的外表面堆砌一部分焊料的现象叫作

A.焊件移位或变形
B.焊件假焊
C.焊件流焊
D.焊件烧坏
E.焊件焊缝有微孔

考点:口腔医学技术士口腔技士专业实践能力初级口腔技士专业专实践能力
题型:单项选择题
连一连。
①6000+2000
②1400-700
③9000-4000
④600+900
  
 
 
 
700
8000
5000
1500
题型:单项选择题

一定质量的密封气体,当它的体积被压缩以后,它的密度将(  )

A.减少

B.不变

C.增大

D.无法判断

题型:单项选择题

2012年4月30日4时50分.我国西昌卫星发射中心用,成功发射了两颗北斗导航卫星,关于火箭和导航卫星的说法,下列选项中正确的是    [ ]

A  火箭升空过程中,燃料燃烧释放的内能全部转化成火箭的机械能  

B  火箭加速上升时只受到重力的作用 

C  导航卫星随火箭升空过程中,相对于火箭是运动的  

D  导航卫星和地面的联系是利用电磁被传递信息

题型:单项选择题

Barditch High School decided to hold an All-School Reunion. Over 450 people came to the event. There were tours of the old school building and a picnic at Confederate Park. Several former teachers were on hands to tell stories about the old days. Ms. Mabel Yates, the English teacher for fifty years, was wheeled to the Park.

Some eyes rolled and there were a few low groans(嘟囔声)when Ms.Yates was about to speak. Many started looking at their watches and coming up with excuses to be anywhere instead of preparing to listen to a lecture from an old woman who had few kind words for her students and made them work harder than all the other teachers combined.

Then Ms. Yates started to speak:

“I can’t tell you how pleased I am to be here. I haven’t seen many of you since your graduation, but I have followed your careers and enjoyed your victories as well as crying for your tragedies. I have a large collection of newspaper photographs of my students. Although I haven’t appeared in person, I have attended your college graduations, weddings and even the birth your children, in my imagination.”

Ms. Yates paused and started crying a bit. Then she continued:

“It was my belief that if I pushed you as hard as I could, some of you would succeed to please me and others would succeed to annoy me. Regardless of our motives, I can see that you have all been successful in you chosen path.”

“There is no greater comfort for an educator than to see the end result of his or her years of work. You have all been a great source of pleasure and pride for me and I want you to know I love you all from the bottom of my heart.”

There was a silence over the crowd for a few seconds and then someone started clapping. The clapping turned into cheering, then into a deafening roar(呼喊). Lawyers, truck drivers, bankers and models were rubbing their eyes or crying openly with no shame all because of the words from a long forgotten English teacher from their hometown.

小题1:What activity was organized for the school reunion?

A.Sightseeing in the park.

B.A picnic on the school playground.

C.Telling stories about past events.

D.Graduates’ reports in the old building.小题2:What can be inferred from Paragraph 2? 

A.Some graduates were too busy to listen to Ms. Yates’ speech.

B.Many graduates disliked Ms. Yates’ ways of teaching.

C.Some people got tired from the reunion activities.

D.Most people had little interest in the reunion.小题3:We can learn from Ms. Yates’ speech that she _____________.

A.kept track of her students’ progress

B.gave her students advice on their careers

C.attended her students’ college graduations

D.went to her students’ wedding ceremonies小题4:What was Ms.Yates’ belief in teaching teenagers?

A.Teachers’ knowledge is the key to students’ achievements.

B.Pressure on students from teachers should be reduced.

C.Hard-pushed students are more likely to succeed.

D.Students’ respect is the best reward for teachers.

题型:单项选择题

男,25岁。诊断左肾结核,右输尿管结石,直径0.8cm,静脉肾盂造影:左肾未显示,右肾轻度积水,结石下输尿管显示正常,肾功能检查正常,宜先行哪种治疗()

A.切除左肾

B.引流右肾积水

C.急诊右输尿管切开取石

D.抗结核的同时等待结石自然排出

E.抗结核的同时行输尿管结石体外冲击波碎石

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