下列对化学反应的认识正确的是_刷题宝

题干

下列对化学反应的认识正确的是

A：化学反应过程中，分子的种类和数目一定发生改变

B：如果某化学反应的△H和△S均小于0，则反应一定能自发进行

C：化学反应过程中，一定有化学键的断裂和形成

D：放热反应的反应速率一定比吸热反应的反应速率大

上一题下一题 0.0难度选择题更新时间:2014-09-20 04:18:16

答案(点此获取答案解析）

C

同类题1

从1895至1913年，随着通商口岸的外国工业合法化，至少又有136家外资制造业和采矿企业在华建立，它们创办时的资本投资额都超过十万中国元，导致“通商口岸的外国工业合法化”的不平等条约是（）

同类题2

_____ in the iron cage of the zoo, the tiger got quite angry.

同类题3

商品价格决定于

同类题4

某几何体的三视图如图所示，则组成该几何体共用了（　　）小方块．

同类题5

阅读下面短文，选择正确答案。

I have two friends. They are Bob and his sister Amy. Look! Bob

has a white T-shirt. He is not tall but fat. He is 10 years old.He

can ride a bike. Amy is the girl. She has a red skirt. She likes red

very much. She can fly a kite. She is 9 years old.

Oh! Look! The boy is me. I have a big mouth and long hair. I am

10 years old. I like swimming. I can swim very well. The little dog

is my friend, too. He can run and jump. He has big ears and a big

mouth. He is cute (可爱). I love him.

小学学科试题库

初中学科试题库

高中学科试题库