下图所示物质的用途中，没有发生化学变化的是（） A．氮气充食品袋防腐 B．

发布时间：2017-06-05 01:00 │ 来源：www.tikuol.com

题型：选择题

问题：

下图所示物质的用途中，没有发生化学变化的是（　　）

A．

氮气充食品袋防腐

B．

氢气做高能燃料

C．

氧气用于动物呼吸

D．

煤燃烧用于取暖

考点：物理变化和化学变化的特征和判别

题型：选择题

请阅读这篇短文，根据短文内容完成下面表格中关于小沈阳和刘谦的信息。

     As we know, Xiao Shenyang and Liu Qian did wonderful jobs in the CCTV Spring Festival Gala. Now
many people are crazy about these two persons. But how much do you know about them?
     Xiao Shenyang was born in a poor peasant family which is in difficult family conditions. His real name
is Shen He. He is an actor. He is good at Er Ren Zhuan. He learned acts, following Zhao Benshan. During
the school life, he was very active in many activities. He looks like a simple man, but he never stops pursuing
(追求) his artistic aspiration (渴望). More and more people like his style of performance, and we hope he
can make great progress in the future.
     Liu Qian is a young magician from Taiwan. At the age of 7, Liu saw a cute magic toy in a shop. At that
moment he began to love and decided to learn magic. Liu didn't go to any magic school. He practiced tricks
every day to improve his skills, until one day he was able to put on a show for his class. He saw the surprise
on everyone's face, and he felt it was cool. He often does street shows for passers-by, police and farmers.
He worked hard at it. Now he is a famous magician.

	Xiao Shenyang	Liu Qian
Job	An actor	A young 3. __________ from Taiwan
How to succeed	He learned acts, following Zhao Benshan. During the school life, he 1. __________. He looks like 2.___________. But he never stops pursuing the artistic aspiration.	He always learned magic 4. __________ at the beginning. At his show for his class, he found everyone 5.__________ and he felt it was cool. He often does street shows for people. He works hard at it.

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题型：选择题

（）的房态表示住客会因会客或其他原因需要服务员立即打扫。

A.L/B

B.OOO

C.DND

D.MUR

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题型：选择题

霍乱病人发病后最先出现的常见症状是（）

A.呕吐

B.腹泻

C.腹痛

D.畏寒发热

E.肌肉痉挛性痛

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题型：选择题

普查妇女乳腺癌时测量疾病的频率指标应选用

A．发病率

B．发病专率

C．罹患率

D．患病率

E．感染率

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题型：选择题

男，40岁，查见右上6面深龋，颊侧近中探及深达根尖的牙周袋，探之溢脓，叩（-），松动Ⅰ度，X-ray示牙槽骨高度基本正常，根尖区阴影。

最适宜的治疗为（）

A.根管治疗

B.牙周系统治疗

C.先做根管治疗，再做牙周系统治疗

D.干髓治疗和牙周系统治疗

E.直接进行牙周和根尖手术

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