下列哪项矫正技术托槽是矫治器的关健部件() A.Beegg细丝弓矫治器 B.方丝弓矫

题型:单项选择题 A1/A2型题

问题:

下列哪项矫正技术托槽是矫治器的关健部件()

A.Beegg细丝弓矫治器

B.方丝弓矫治器

C.直丝弓矫治器

D.13外唇弓矫治器

E.13外垂直牵引矫治器

考点:重庆住院医师口腔科Ⅰ阶段口腔正畸学口腔正畸学题库
题型:单项选择题 A1/A2型题

妇女保健统计知道正确的事()。

A.产前检查率=当年接受产前检查的人数/同期产妇总人数×1000%。

B.住院分娩率=当年住院分娩的人数/同期产妇率x1000%。

C.孕产妇死亡率=当年孕产妇死亡率/当年活产儿数×10000/10万

D.人口出生率=某年出生人数/同年平均人口数/1000%

E.普查率=接受治疗人数/患病总人数×1000%

题型:单项选择题 A1/A2型题

关于食管癌放疗以下说法正确的是

A.术前放疗常用的剂量是60~70Cy

B.放疗手术后2~3周为手术最佳时期

C.食管癌术后病理证实吻合口残端肿瘤阳性,应用术后化疗

D.术前放疗提高远期生存率

E.食管癌术后肝转移,可用放射治疗

题型:单项选择题 A1/A2型题

图中电流表的示数是 _________ A.

题型:单项选择题 A1/A2型题

阅读理解。

     Studying volcanoes is a demanding profession. Hazel Rymer frequently has to struggle through

rainforests, climb to the top of mountains, then climb 200 metres into the crater of active volcanoes.

But the 38-year-old volcanologist does her best to make it sound less alarming than it is. “Driving to

work is more risky,” she insists. “And the deepest I go into the crater of a volcano is about 300 metres,”

she adds, trying to make it all sound as ordinary as taking the dog for a walk.

     Hazel has been studying volcanoes for a long time, so it’s not surprising she is used to the danger.

Her interest in volcanoes began at school. A teacher gave her a book about Pompeii. “I remember

reading about the eruption of Vesuvius and the destruction of the city,” she explains. “The thought of

all those people just frozen in time had quite an effect on me and I am still excited by their dangerous

beauty today.”

     Nowadays, volcanoes are getting more and more unpredictable. There have been many changes

in sea level caused by global warming and melting ice caps. These have resulted in some dormant

volcanoes erupting, so studying them is more dangerous than ever before. Hazel says that although she

doesn’t take any unnecessary risk she has had some frightening moments. Her worst experience was

on the slopes of Mount Etna in Sicily, when she was slowly surrounded by lava. “I had a choice of

walking ten hours to get around the lava flow or just walking across it,” she explains. She chose to pick

a path across the cooler rocks in the lava stream. “I guess it was five metres. The flow was 1,000°C,

so if you hesitated your boots would begin to melt. It was scary, but it really was a practical decision -

there wasn't time to do anything else.”

     And what about the future? “I haven’t been to the volcanoes in Indonesia yet. And I would love to

spend some time working in the Antarctic,” she says. “I would also like to know why quiet lava flows

erupt from some volcanoes and why other volcanoes go bang.” In other words, Hazel Rymer won’t

be exchanging her volcanoes for the relative safety of driving to work just yet.

1. Hazel’s claim that “driving to work is more risky” than exploring volcanoes shows that ______.

A. people have exaggerated the dangers of volcanoes in the past

B. Hazel does not really understand the dangerous situations she puts herself in.

C. there are many bad drivers in the place where Hazel lives

D. Hazel is being modest and understating the dangers she faces

2. When did Hazel first become interested in volcanoes?

A. When she was visiting Italy.

B. When she was at school.

C. When she was twenty.

D. When she saw Vesuvius.

3. The underlined word “these” (in paragraph 3) refers to __________.

A. melting ice-caps

B. volcanic eruptions

C. changes in sea level

D. higher temperatures

4. When Hazel was on Mount Etna she had to ________.

A. take a dangerous route

B. take an unnecessary risk

C. leave her boots behind

D. walk for ten hours around the mountain

5. In the future, Hazel wants to ________.

A. revisit volcanoes she knows

B. go on holiday to the Antarctic

C. find a less dangerous job

D. discover new things about volcanoes

题型:单项选择题 A1/A2型题

脑损伤包括()、()和()三种。

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