（8分）以下是某化学探究的过程。请在下列横线上填写适当的内容。向NaOH溶液中滴入紫色石蕊试液，溶液显蓝色（1）提出问题：是什么粒子使紫色石蕊试液显蓝色呢？（2）查找资料：NaOH溶-九年级化学

更多内容推荐

• 蜡烛是由石蜡和棉线组成的．（1）石蜡放入水中，浮在水面上，说明石蜡的密度比水的密度（填“大”或“小”）．（2）点燃蜡烛在其燃烧过程中，属于物理变化的是．（3）取一火柴梗，拿住一端迅-九年级化学
• 请听句子，选择相应的答语。( )1. A. Carrots. ( )2. A. Yes. I'm well. ( )3. A. No problem. ( )4. A. A giraffe.
• 听句子，选择正确应答语。每个句子读一遍。( )1. A. For two hours.( )2. A. Yes, we have to.( )3. A. OK! What's the tim
• 根据听对话，从A-F 中选择最佳选项匹配句子。( ) 1. Alice wants to ( ) 2. Tom wants ( ) 3. Kate wants to( ) 4. Maria wants
• 根据听到的句子，从所给的A、B、C三个选项中选择符合题意的图画。（每个句子听两遍）( )1. A. B. C. ( )2. A. B. C. ( )3. A. B. C. ( )4. A. B. C.
• 听小对话，选择图片。1. What' s the girl looking for? A B C2. What are the children doing? A B C3. What c
• 听下面一段独白，完成1-5题。 1. Where did the speaker learn the story of Wang Ling? [ ]A. On TV. B. In the newspa
• 听句子，选择与句子内容相关的图。1. _______ 2. ________ 3. _________ 4. _________ 5. __________ -九年级英语
• 听对话，将符合情景对话的图画的代码填到横线上。1. 2. 3. 4. 5. -八年级英语
• 听下面一段材料，回答第1-3小题。 1. Wen did the boy lose his schoolbag? [ ]A. While he was playing soccer. B. When
• 听第下面一段材料，回答第1-3题。 1. What might be the relationship between the two speakers? [ ]A. Workmates.B. Fri
• Listen and choose the right picture. (听句子，选择正确的图片，用A，B，C…或F等表示。) A.B.C.D.E. F. 1．_________ 2．_______
• Listen to the passage and complete the table.(根据听到的短文内容，完成下列表格填写，每空一词。) Good evening everyone. This
• 根据所听短文内容，选择正确答案。 1. What does the boy show his interest in?[ ]A、Maths. B、English. C、Science. 2. What
• 听下面一段材料，回答第1-4小题。 1. What are the speakers mainly talking about? [ ]A. Life. B. Camping. C. Plans. 2
• 听问句，选择最佳答语。( ) 1. A. I'm not feeling well.( ) 2. A. Two days. ( ) 3. A. Yes, I don't . ( )
• 听下面一段对话，回答第1至3三个小题。1. What color is Jane's coat? [ ]A. Orange. B. Yellow. C. Red. 2. What color
• 听下面一段对话，回答第1-3小题。 1．How did Ann go to school before? [ ]A．By bike B．on foot C．By bus 2．How long does
• 听下面五个问题。 从每小题中所给的A、B、C 三个选项中选出最佳选先项。每个问题读两遍。( )1. A. Class 8 B. Team 8C. Grade 8 ( )2. A. Her name i
• 听短文，根据短文内容，完成下列表格。 （短文念三遍）Names Where What were people doingAnnin the 1. reading newspapersHelen on
• 听下面一段对话，回答1-3题。 1. How is the boy going to Beijing Wildlife Park tomorrow? [ ]A. By bus. B. In a car
• 听下面一段对话，回答1-3题。 1. How old is Peter? [ ]A. 12. B. 14. C. 15. 2. What do we know about Tom? [ ]A. He
• 听对话，从每小题所给的选项中选出与所听对话内容相符的图画。听两遍。( )1. ( )2. ( )3. ( )4. ( )5. -八年级英语
• 听录音，做笔记。 A Film Name: Midnight 1. __________. Shown time: at 6:30 and 9:10 from Monday to 2. _______
• 短文理解：听短文，填写下面表格。Action Make a decision to stop the use of free 1. bags 2. Supermarkets, shops and ou
• 根据所听短文，选择最佳答案。（短文读两遍）1. How old can young people go to a bar? [ ]A. Seventeen. B. Over eighteen. C.
• 你将听到一篇短文，短文后有五个问题。请根据短文内容，在每小题所给的A、B、C三个选项中选出最佳选项.短文读两遍。1. Who is this letter to? [ ]A. John. B. Jac
• 听下面5段对话。每段对话后有一个小题，从每小题所给A、B、C三个选项中选出最佳选项。每段对话和问题读两遍。1. Who has more weeks off in the summertime? [
• 对话理解，请听对话及问题，选择最佳答案。( ) 1. A. Because she has a sore back. B. Because she has a cold. C. Because she
• 图片理解。听下面的5段对话，每段对话后有一个问题，请根据所提的问题选择正确的图画。每段对话及问题读两遍。( )1. ( )2. ( )3. ( )4. ( )5. -八年级英语
• 听下面一段独白，回答1-5题。听两遍。 1. By which means (方式) can we get a lot of knowledge faster?[ ]A. By listening t
• 听句子，选出相应的图画。A. B. C. D. E. 1. 2.3.4.5.-八年级英语
• 听下面一段对话，回答第1-2小题。 1. What was the weather like in California last winter? [ ]A. It was as cold as in
• 听下面五段对话，回答第1-5题。1. What's the woman doing? [ ]A. She is singing a song. B. She is writing a pap
• 听下面一段对话，回答1-2小题。 1. What does the woman like in New York? [ ]A. The traffic.B. The theatres.C. The s
• 听下面一段对话，回答1-2题。 1. What are they going to do this evening? [ ]A. Go to the supermarket.B. Go to the
• 听录音，完成句中所缺的单词，一空一词。1. This is a _______ room and that's an _______ one. 2. "I'm very
• 听下面一段对话，回答1-2题。 1. What's wrong with David? [ ]A. He has no time to play computer games.B. He c
• 听下面一段对话和问题选择正确答案。1. Is the woman a teacher in a middle school ?[ ]A. Yes. B. No. C. I don't kno
• 听下面一段对话，回答1-3题。 1. Why does Sam like Kunming? [ ]A. Because the weather is hot and cloudy. B. Becaus
• 听短文，然后根据问句选择正确的答案。1. What class is Zhao Yuanyuan in? She's in ______. [ ]A. Class 8 B. Grade 3
• 对话理解。根据你所听到的对话和问题，请从A、B、C三个选项中选出正确答案。( )1. A. Pop music ( )2. A. Four days ( )3. A. A worker ( )4. A
• 下面你将听到5小段对话，请根据所听到的对话，选出正确的选项。1. What does the boy want to learn? [ ]A. B. C. 2. What is Tom's
• 听下面一段对话，回答1-2题。 1. Where is Bob living now? [ ]A. In a town in England. B. In West Hills, a small t
• 听下面一段对话，回答1-3题。 1. What does the man want to do?[ ]A. To sell the flat.B. To buy the flat.C. To chan
• 听句子，根据内容选择相关的运动1._____ 2._____ 3._____ 4._____ 5. _____-七年级英语
• Listen to the dialogue and choose the best answer to the question you hear.(根据你所听到的对话和问题，选出最恰当的答案，用A
• 听下面一段对话，回答1-2题。 1. What does Mr. Brown do? [ ]A. A doctor.B. A teacher.C. A driver. 2. What time doe
• 听下面一段对话，回答第1-3小题。 1. What is the woman? [ ]A. A teacher.B. A student. C. A businesswoman. 2. What wi
• 听下面段对话，回答1-3题。 1. Why is David so fat? [ ]A. Because he doesn't exercise.B. Because he eats too