简述妊娠期龈炎临床表现。

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问题:

简述妊娠期龈炎临床表现。

考点:口腔执业医师实践技能妊娠期龈炎妊娠期龈炎题库
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本初子午线是( )

A.180

B.20

C.160

D.0经线

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下列哪种疾病的原始细胞,非特异酯酶染色阳性能被氟化钠(NaF)抑制()

A.急淋白血病(ALL-L3)

B.急非淋白血病(AML-M3)

C.急非淋白血病(AML-M5)

D.急性巨核细胞白血病(AML-M7)

E.浆细胞白血病

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阅读理解。

根据短文内容,从短文后的选项中选出能填入空白处的最佳选项,选项中有两项为多余选项。

     There was once a lonely girl who longed so much for love. One day while she was walking in the

woods she found two starving birds    1   . She cared them with love and the birds grew strong. Every

morning they greeted her with a wonderful song. The girl felt the great love from the birds.

       2  . The larger and the stronger of the two birds flew from the cage. The girl was so frightened that

he would fly away. As he flew close, she grasped him wildly. Her heart felt glad at her success in

capturing him.  3  . She opened her hand and stared in horror at the dead bird. Her desperate love had

killed him.

     She noticed the other bird moving back and forth on the edge of the cage. She could feel his great

need for freedom. He needed to fly into the clear, blue sky.  4  . The bird circled once, twice, three times.

     The girl watched delightedly at the bird's enjoyment.  5  . She wanted the bird to be happy. Suddenly

the bird flew closer and landed softly on her shoulder. It sang the sweetest songs that she had ever heard.

The fastest way to lose love is to hold on it too tight, while the best way to keep love is to give it wings!

A. She gave them some delicious food and left.  

B. Suddenly she felt the bird go softly.

C. Her heart was no longer concerned with her loss.

D. One day she left with the two birds at home alone.

E. She took them home and put them in a small cage.  

F. One day the girl left the door of the cage open.  

G. She lifted him from the cage and threw him softly into the air.

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锅炉燃油时为什么烟囱有时冒黑烟?

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通信线路是Internet的基础设施,其主要分为【 】和无线线路。

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