【查阅资料】电石的主要成分是碳化钙（CaC₂），可以与水反应生成一种可燃性气体及白色固体。常见的可燃性气体中，乙炔（C₂H₂）燃烧时伴有大量黑烟。

【猜想与假设】

电石与水反应生成的可燃性气体是：氧气、氢气或乙炔（C₂H₂）；同学们做出以上猜想的依据是____，大家讨论后，一致认为该气体不可能是氧气，原因是____。电石与水反应生成的白色固体是：氧化钙、氢氧化钙或碳酸钙中的一种。同学们经过讨论认为白色固体不可能是氧化钙，因为氧化钙会与水反应。

【实验探究】

【反思交流】请根据以上实验结论写出电石与水的反应的化学方程式____；

载有电石货车可以在雨中整整燃烧一天而不熄灭，说明电石与水反应是____（填“吸热”或“放热”）反应。

①端正自己的态度，理解父母的苦心

②尊重父母，与父母有分歧时，注意控制自己的情绪

③创造 机会，多与父母交流、沟通

④不随意发脾气，最好是不吱声，避免冲突

人体自身一般不能合成，必须由食物供给的是（　　）

阅读下列短文, 从每题所给的四个选项(A、B、C、D)中选出最佳选项。

    Do you enjoy reading? Here readers of your age from all over the United States recommend(推荐)great books for you to read：

①Don't Die, My Love  

  My favorite book is Don't Die My Love by Lurlene McDaniel．I love all her books．but this was the first one I read and I have to say, it is by far my favorite．It doesn't end like other books．

and I cried while reading．

②Nancy

    I think Nancy Drew is great! Nancy is a detective(侦探)who has many fantastic ideas! I love it because it's a book from when my grandma was my age, and I can share the fun with her !

③Skinny Bones

  I highly recommend Skinny bones by Barbara Park．It is funny, so please add it on your book list．You don't want to miss out funny stories !

 ④    ? 

    I would suggest             by Judy Blume．It is based on(基于)real things that happened to Judy Blume．It is about a girl, Alice, who meets some girls at a new state．They become friends, make a club and meet twice a week．They stop after two weeks because they all like a boy in their class and put him as Number One．I think every girl should read this because it is about our growing up．

⑥Neela：Victory Song

  I read a book called Neela：Victory Song and it was so good that I read it twice! It takes place in India in l936 and this l2-year-old girl named Neela tries to save her father! It has lots of his to “cal stories in it! I also learned a lot about different cultures! The writer's name is Chitra Banerjee Divakaruni．