按要求写出下列物质的化学式：（1）空气中存在最多的气体______；（2）通

发布时间：2017-04-13 14:01 │ 来源：www.tikuol.com

题型：填空题

问题：

按要求写出下列物质的化学式：

（1）空气中存在最多的气体______；

（2）通常状态下密度最小的气体______；

（2）“低碳生活”倡导减少的气体______；

（4）煤燃烧产生的污染空气的主要有害气体______．

考点：燃料的利用和新能源的开发空气的成分空气的污染和防治化学式的写法和意义化合价的求法

题型：填空题

完形填空。

    Bill was out of luck that day. Mr Smith, their English teacher, made him stay in the classroom after
school    1    he finished his homework. He had to do it. Mr Smith was in the office. The    2    was
open and the teacher could see him if he    3    school. One hour    4   , he gave his homework to his
teacher and ran home. He knew his aunt would go to see them on that day. She    5    bought some
delicious cakes for them. But when he got home, he didn't    6    any cakes on the plate. His brother
ate them up (吃光).
     The next morning the boy was still angry. He couldn't listen to his teacher carefully. "Make a sentence
with 'egg', class" said Mr Smith. All the students did. Only Bill looked out of the    7    and didn't put up
his hand. "Let's listen to Bill's sentence." The boy had to    8   . He thought for a few minutes and said,
"I didn't eat any cakes    9   ." All of his classmates laughed. Mr Smith asked, "  10   is the egg?" "It's in
the cake. Sir"

( )1. A. until
( )2. A. table
( )3. A. went to
( )4. A. before
( )5. A. never
( )6. A. find
( )7. A. wall
( )8. A. get up
( )9. A. today
( )10. A. What

B. when
B. desk
B. got to
B. ago
B. sometimes
B. make
B. tree
B. sit down
B. yesterday
B. When

C. because
C. door
C. returned
C. later
C. always
C. keep
C. school
C. go to bed
C. tomorrow
C. Where

D. and
D. book
D. left
D. after
D. seldom
D. eat
D. window
D. stand up
D. Sunday
D. How

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题型：填空题

生态因素是指环境中影响生物生活的非生物因素．如：阳光、水、温度等．______．

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患者男，63岁，上颌全牙列缺失，散在骨尖。下颌多数牙缺失，仅余，近中舌侧倾斜，牙槽嵴丰满，间距离正常

宜用哪种卡环（）

A．圈形卡

B．联合卡

C．回力卡

D．杆形卡

E．对半卡

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题型：填空题

下列选项关于信用评分模型进行风险分析在使用过程中的一些局限性，分析不正确的是（）。

A．建立在历史市场数据模拟基础上，是一种向后看的模型

B．对借款人的历史数据要求相当高，对新兴企业不利

C．无法提供客户违约概率的准确数据

D．以上说法均不正确

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题型：填空题

应用文写作：
某高校佛教研究所拟于今年8月20日至28日，在山西太原市晋阳饭店，召开全国佛教界净土宗学术研讨会。参加者有海峡两岸三地的宗教界人士、社科院及高等院校的专家学者。
请你为本次会议拟一个通知，内容包括：会议宗旨、参加人员、论文截止日期、接机接站事项、报到时问、报销事项等。要求格式正确，语言通顺，没有遗漏。

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按要求写出下列物质的化学式： （1）空气中存在最多的气体______； （2）通

问题：

按要求写出下列物质的化学式：（1）空气中存在最多的气体______；（2）通