已知圆的直径为12cm,如果圆心到直线的距离为4cm,那么直线与圆有______

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问题:

已知圆的直径为12cm,如果圆心到直线的距离为4cm,那么直线与圆有______个交点.

考点:直线与圆的位置关系(直线与圆的相交,直线与圆的相切,直线与圆的相离)
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学习动机是决定学习效果的唯一条件。 ( )

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期权的卖方在一定期限内必须无条件服从买方的选择并履行成交时的允诺。 ( )

题型:填空题

Beijing Opera is also called Peking Opera.. It came into being after 1790 when the famous four  Anhui opera troupe(戏班) came to Beijing. Its music and singing(唱腔) came from Xipi and Er-huang in Anhui and Hubei. Its costtumes are all fascinating and artistic.It is the highest expression of the Chinese culture. It’s full of famous stories , beautiful facial paintings, and wonderful gestures and fighting. This kind of opera is very popular with Chinese people.

There are four main roles in Beijing Opera: Sheng ,Dan, Jing and Chou. Sheng is the leading male(男性) actor。For example , a Wusheng is a soldier or fighter .A Xiaosheng is a young man . A Laosheng is the comedy actor or clown.Dan is the female (女性)role 。 Jing,mostly male , is the face-painted role and Chou is the comedy actor or clown.

Stories in Beijing Opera are very intetesting . Some of them are from the history book ,but most of them are from the literature , especially famous novels . The people in the story usually have some disagreements. They become angry and uhappy . They are sad and lonely . Sometimes they are nervous and worried. Then they find a way to make peace . The stories usually end with happiness and lunghter and people are all happy in the end.

小题1:.Beijing Opera’s singing is from _______.

A.Anhui and hubei

B.Beijing and Anhui

C.the history book

D.the literature and novls小题2:.The second paragraph(段落) of the reading is about the______of Beijing Opera.

A.stories

B.roles

C.gestures

D.Paintings小题3:From the reading ,we know the the Chou most probably has a(n) _____feature.

A.honest

B.funny

C.dull

D.serious小题4:.Which of the following statements is TURE?

A. Peking Opera is full of different gestures.

B. There are only four roles in Beijing Opera.

C. Beijing Opera is the most popular in the world.

D. The people in the story usually are in agreement.小题5:What role is Sheng ?

A.the eading male actor

B.the female role

C.the comedy actor or clown.

D.the face-painted role

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血浆的主要功能是(  )

①运输氧②运输二氧碳③运输血细胞④运输养料和废物.

A.①②

B.③④

C.①③

D.②④

题型:填空题

目前认为扩张型心肌病最主要的病因是()

A.单基因显性遗传

B.持续病毒感染

C.冠状动脉病变

D.药物因素

E.心肌能量代谢障碍

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