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小博士：我们在这几个月的学习里，接触到不少的疑问词，其中疑问代词占大多数。那么疑问代词有哪些？又有哪些用法呢？看看下面的总结吧！
1)疑问代词在句中起名词词组的作用，用来构成疑问句。疑问代词有下列几个：
指人：who，whom，whose
指物：what
既可指人又可指物：which
2)疑问代词在句中应位于谓语动词之前，没有数的变化，除who之外也没有格的变化。无论是做疑问代词还是限定词，which和what所指的范围都是不同的。what所指的范围是无限的，而which则指在一定的范围内，例如：
Which movies do you like best?
你喜欢哪几个部电影？
What movies do you like best?
你喜欢什么样的电影？
你明白了吗？那么就请选用刚才我讨论过的疑问词完成下面句型转换。
1 My favorite subject is science.
________ ________ your favorite subject?
2 He likes art best.
________ ________ he like best?
3 My science teacher is Mr Green.
________ ________ your science teacher?
4 He's really busy today.
________ ________ really busy today?
5 Betty's backpack is in her bedroom.
________ backpack is here?
查看习题详情和答案>>按要求完成句子，每空一词。(10分)
1.The apples are green. (对划线部分提问)
_________ _________ are the apples?
2.This is my coat. (改为复数形式)
_________ _________ my coats.
3.That is Tom’s new shirt. (对划线部分提问)
_________ new shirt _________ that?
4.It is pink. (用blue构成选择疑问句)
_________ it pink _________ blue?
5.Orange is her favourite colour. (对划线部分提问)
_________ _________ favourite colour?
查看习题详情和答案>>
_____ _____ some water, please.
2. Please buy me a new bike. (同义句转换)
Please _____ a new bike _____ me.
3. The w
atch is 100 yuan. (对划线部分提问)_____ is the _____ of t
he watch?4. He wants to buy some apples. (用 oranges 构成选择疑问句)
_____ he _____ to buy any apples _____ oranges?
5. We want to buy some meat. (同义句转换)
We _____ _____ to buy some meat.
_____ _____ are the apples?
2. This is my coat. (改为复数形式)
_____ ______my coats.
3. That is Tom's new shirt. (对划线部分提问)
_____ new shirt _____ that?
4. It is pink. (用blue构成选择疑问句)
_____ it pink _____ blue?
5. Orange is her favourite colour. (对划线部分提问)
_____ _____ favourite colour?
(1) A的电子式为________，B的分子式为________。
若用B与O2制成燃料电池，并以稀硫酸溶液为电解质溶液，回答(2)-(5)题：
(2)负极上的电极反应式为_______________________________________。
(3)消耗标准状况下的5.6 L O2时，有__________mol电子发生转移。
(4)开始放电时，正极附近溶液的pH__________(填“增大”、“减小”或“不变”)；
(5)溶液中H+由___________区向__________区移动（填“正极”或“负极”）。 查看习题详情和答案>>