A:日全食和日偏食
B:日全食和日环食;
C:日全食、日偏食和日环食
D:日偏食和日环食;
对于工业废气中余氯的定量测定常用的化学分析法是( )
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!
8-4-2=____
4+1+0=____
7-2-3=____