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环境保护海报设计 要求: 1、以图形语言为主要信息传达方式,设计元素的选取力求新颖别致。 2、标题简洁精炼,紧扣主题。 3、以JPG格式保存。
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【多选题】纤维素热解产物中主要的 C 2 ~ C 4 含氧产物 包括 ( )。
A.
乙醇醛
B.
丙酮醇
C.
甘油醛
D.
丙酮醛
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【简答题】听短文，选择正确的单词填入恰当的内容完成表格。 Name Likes playing Where the sports things are Likes eating Tommy (1)________ The balls are under his bed. tomatoes Paul tennis The racket is on the (2)_______ (3)________ Sall...
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【简答题】Look!Bill is playing with his friends on the_____(操场). 7.Paul,you should_____(打扫)your room. OK,mom 8. Ellen likes______(跳舞)very much. She thinks it is good for her. 9.Wait for me,Jack. I'll come back_...
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【简答题】阅读短文，判断下列句子正(T)误(F)。 Hello! My name is Tom. I live in a big town near Nanjing. I am tall. I have short hair. I like swimming. I have many good friends. They are Millie, Peter and Paul. Millie likes si...
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【单选题】听力原文：M: Do you think we should urge Bob to study English? W: We'll have to leave that decision up to him. What does the woman mean?
A.
They should go up to Bob's study.
B.
Bob should decide about English for himself.
C.
Bob is leaving for England.
D.
They have to make an urgent decision.
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【简答题】Please look at the photo. It is the photo 1 my family. This is my grandfather. 2 name is Dave Hand. He is a doctor. And this is my grandmother. Her name 3 Anna Brown. She is my father’s 4 . The tall m...
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【单选题】Paul likes playing ____piano, but he doesn’t like playing ___golf.
A.
/; the
B.
the; /
C.
the; the
查看完整题目与答案
【单选题】公关专题活动是在审时度势后,根据组织或公众的某种特殊需要而举办的,是指公关专题的 ( ) 特点
A.
针对性
B.
传播性
C.
灵活性
D.
创新性
查看完整题目与答案
【简答题】根据内容完成下列句子。. Paul is one year older than  Bill.   He likes talking to everyone.    He does well in chemistry and playing  football. He usually rides his bike to school.  He isn't shorter than Bill. He...
查看完整题目与答案
【多选题】半纤维素 热解 主要包括下列那些选项中的 产物?
A.
高温区残炭含量高
B.
液体以丙酮、乙醇醛、1-羟基丙酮、糠醛、甲醛和水为主
C.
气体有CO、CO 2 、CH 4
D.
快速分解以酸、酮、醇及糠醛为主，其中酸类产物乙酸最多；高温有利于生成酮类产物，一般含碳原子不超过3； 温度进一步升高有利于C-C键断裂生成醇，包括丙酮醇。
查看完整题目与答案
相关题目：
【多选题】纤维素热解产物中主要的 C 2 ~ C 4 含氧产物 包括 ( )。
A.
乙醇醛
B.
丙酮醇
C.
甘油醛
D.
丙酮醛
查看完整题目与答案
【简答题】听短文，选择正确的单词填入恰当的内容完成表格。 Name Likes playing Where the sports things are Likes eating Tommy (1)________ The balls are under his bed. tomatoes Paul tennis The racket is on the (2)_______ (3)________ Sall...
查看完整题目与答案
【简答题】Look!Bill is playing with his friends on the_____(操场). 7.Paul,you should_____(打扫)your room. OK,mom 8. Ellen likes______(跳舞)very much. She thinks it is good for her. 9.Wait for me,Jack. I'll come back_...
查看完整题目与答案
【简答题】阅读短文，判断下列句子正(T)误(F)。 Hello! My name is Tom. I live in a big town near Nanjing. I am tall. I have short hair. I like swimming. I have many good friends. They are Millie, Peter and Paul. Millie likes si...
查看完整题目与答案
【单选题】听力原文：M: Do you think we should urge Bob to study English? W: We'll have to leave that decision up to him. What does the woman mean?
A.
They should go up to Bob's study.
B.
Bob should decide about English for himself.
C.
Bob is leaving for England.
D.
They have to make an urgent decision.
查看完整题目与答案
【简答题】Please look at the photo. It is the photo 1 my family. This is my grandfather. 2 name is Dave Hand. He is a doctor. And this is my grandmother. Her name 3 Anna Brown. She is my father’s 4 . The tall m...
查看完整题目与答案
【单选题】Paul likes playing ____piano, but he doesn’t like playing ___golf.
A.
/; the
B.
the; /
C.
the; the
查看完整题目与答案
【单选题】公关专题活动是在审时度势后,根据组织或公众的某种特殊需要而举办的,是指公关专题的 ( ) 特点
A.
针对性
B.
传播性
C.
灵活性
D.
创新性
查看完整题目与答案
【简答题】根据内容完成下列句子。. Paul is one year older than  Bill.   He likes talking to everyone.    He does well in chemistry and playing  football. He usually rides his bike to school.  He isn't shorter than Bill. He...
查看完整题目与答案
【多选题】半纤维素 热解 主要包括下列那些选项中的 产物?
A.
高温区残炭含量高
B.
液体以丙酮、乙醇醛、1-羟基丙酮、糠醛、甲醛和水为主
C.
气体有CO、CO 2 、CH 4
D.
快速分解以酸、酮、醇及糠醛为主，其中酸类产物乙酸最多；高温有利于生成酮类产物，一般含碳原子不超过3； 温度进一步升高有利于C-C键断裂生成醇，包括丙酮醇。
查看完整题目与答案