A:以客观条件为基础
B:遵循客观事物的规律
C:独辟蹊径,加强创新
D:树立坚定的理想信念
下列各项中,不能称为生态系统的是( )
Read and choose为图画选择相应的文字描述。
A. There are five people in the picture.
B. The shirt isn't Zhang Peng's . It's Mike's.
C. These are horses.
D. It's rainy today. I can open up my umbrella.
E. The shoes are Wu Yifan's.
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