9.[ 命题目的 ] 主要考查介词at的特殊用法. [ 解题点拨 ]表示吃饭用介词at,三餐之前不用定冠词.故选C. 查看更多

 

题目列表(包括答案和解析)

 We are in a world full of competition. Our parents compete (竞争) with others in their offices, our brothers and sisters compete with others in their colleges, and we compete with our classmates in school. Many of us give up in the face of competition and will never be successful. ①cant, others, why, we, do, better, than One important reason is that we have no self-confidence (自信).

In fact, everyone is born equal. You can do what others do. Although your classmates may be better than you in some ways, you may be better than them in other subjects. So everyone has his or her own advantages. Don’t look at things from a single (单个的) point of view. Try to discover your own advantages, and believe that you can do better than others in those ways.

Competition is not so terrible. Don’t be afraid of it. And don’t be afraid of those classmates who are better than you. ②Remember that self-confidence is the first step to success. Believe in yourselves, and you will be successful one day.

任务一: 1. Are we living in a world full of competition?

任务二: 2. How can you improve your self-confidence according to the passage?

任务三: 3. 将①处画线部分单词连成一个完整的特殊疑问句。

任务四: 4. 将②处画线部分译成中文。

任务五: 5. What’s the main idea of this passage?

 

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阿司匹林(乙酰水杨酸)已应用百年,成为医药史上三大经典药物之一,至今它仍是世界上应用最广泛的解热、镇痛和抗炎药,也是作为比较和评价其他药物的标准制剂。乙酰水杨酸受热易分解,分解温度为128~135℃。某学习小组在实验室以水杨酸(邻羟基苯甲酸)与醋酸酐[(CH3CO)2O]为主要原料合成该物质,设计的合成路线为:
一、制备K
s*5u
二、提纯
方案1
方案2
主要试剂和产品的物理常数
名    称
相对分子质量
熔点或沸点(0C)



水杨酸
138
158(熔点)
微溶
易溶
易溶
醋酸酐
102
139.4(沸点)
反应
可溶
易溶
乙酰水杨酸
180
135(熔点)
微溶
可溶
微溶
请根据以上信息回答下列问题:                   
(1)①合成阿斯匹林时,还会生成一些副产品,其中有一种是高分子,为了分离此物质,方案1中加入A物质为      溶液。
②本方案抽滤后进行洗涤,其具体操作是       
(2)方案2为改进的提纯方法,称为重结晶提纯法。
①该方案中步骤1除了选用乙酸乙酯外,还可选择下列哪些
试剂      
A. 乙醇      B. 蒸馏水      C. 乙醚   
②步骤2回流的装置如图所示,写出仪器a的名称      ,使用温度计的目的是      ,冷凝水的流向为       

③方案2所得产品的有机杂质要比方案1少的原因是      
(3)该学习小组在实验中原料用量:2.0g水杨酸、5.0ml醋酸酐(ρ=1.08g·cm-3),
最终称量产品m="2.2g" ,则乙酰水杨酸的产率为       。

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We are in a world full of competition. Our parents compete (竞争) with others in their offices, our brothers and sisters compete with others in their colleges, and we compete with our classmates in school. Many of us give up in the face of competition and will never be successful. ①cant, others, why, we, do, better, than One important reason is that we have no self-confidence (自信).
In fact, everyone is born equal. You can do what others do. Although your classmates may be better than you in some ways, you may be better than them in other subjects. So everyone has his or her own advantages. Don’t look at things from a single (单个的) point of view. Try to discover your own advantages, and believe that you can do better than others in those ways.
Competition is not so terrible. Don’t be afraid of it. And don’t be afraid of those classmates who are better than you. ②Remember that self-confidence is the first step to success. Believe in yourselves, and you will be successful one day.
任务一:【小题1】 Are we living in a world full of competition?
任务二: 【小题2】 How can you improve your self-confidence according to the passage?
任务三: 【小题3】 将①处画线部分单词连成一个完整的特殊疑问句。
任务四: 【小题4】 将②处画线部分译成中文。
任务五: 【小题5】 What’s the main idea of this passage?

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 We are in a world full of competition. Our parents compete (竞争) with others in their offices, our brothers and sisters compete with others in their colleges, and we compete with our classmates in school. Many of us give up in the face of competition and will never be successful. ①cant, others, why, we, do, better, than One important reason is that we have no self-confidence (自信).

In fact, everyone is born equal. You can do what others do. Although your classmates may be better than you in some ways, you may be better than them in other subjects. So everyone has his or her own advantages. Don’t look at things from a single (单个的) point of view. Try to discover your own advantages, and believe that you can do better than others in those ways.

Competition is not so terrible. Don’t be afraid of it. And don’t be afraid of those classmates who are better than you. ②Remember that self-confidence is the first step to success. Believe in yourselves, and you will be successful one day.

任务一: 1. Are we living in a world full of competition?

任务二: 2. How can you improve your self-confidence according to the passage?

任务三: 3. 将①处画线部分单词连成一个完整的特殊疑问句。

任务四: 4. 将②处画线部分译成中文。

任务五: 5. What’s the main idea of this passage?

 

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We are in a world full of competition. Our parents compete (竞争) with others in their offices, our brothers and sisters compete with others in their colleges, and we compete with our classmates in school. Many of us give up in the face of competition and will never be successful. ①cant, others, why, we, do, better, than One important reason is that we have no self-confidence (自信).
In fact, everyone is born equal. You can do what others do. Although your classmates may be better than you in some ways, you may be better than them in other subjects. So everyone has his or her own advantages. Don’t look at things from a single (单个的) point of view. Try to discover your own advantages, and believe that you can do better than others in those ways.
Competition is not so terrible. Don’t be afraid of it. And don’t be afraid of those classmates who are better than you. ②Remember that self-confidence is the first step to success. Believe in yourselves, and you will be successful one day.
任务一:【小题1】 Are we living in a world full of competition?
任务二: 【小题2】 How can you improve your self-confidence according to the passage?
任务三: 【小题3】 将①处画线部分单词连成一个完整的特殊疑问句。
任务四: 【小题4】 将②处画线部分译成中文。
任务五: 【小题5】 What’s the main idea of this passage?

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