下列函数中,既是偶函数,又在区间(0,+∞) 上单调递减的函数是( )
A:y=x﹣2
B:y=x﹣1
C:y=x2
D:y=x13
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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读图,回答下列各题。