结合你所学到的化学知识回答下面有关问题．
（1）从微观的角度看，水分子是由____构成的．
（2）从宏观的角度看，二氧化碳是由____ 组成的．
进入初中后，老师常说：“过去习惯让人牵着走的同学，现在应该扔掉手中的拐杖，学会自己走路。”“自己走路”的意思是（ ）
请从右栏中为左栏的图片选择相应的文字描述
Picture
Description(描述)
① ____
A. Aren't they lovely? They walk on the ice and snow. They can also swim. Do you want to know more about them?
② ____
B. Do you often watch him play basketball? If you do so, what do you think of him? Good or awesome（令人敬畏的）?
③ ____
C. — I can't find my keys.
— Let me help you.
④ ____
D. — Where's your pen friend from?
— Sydney. Oh, it's in Australia.
⑤ ____
E. Do you enjoy playing soccer? Look! They often play after school. How excited they are!
