We always pay attention to the weather because it ________us so directly what we wear,what we do and even how we feel.
A:benefits
B:affects
C:concludes
D:attracts
某人由于营养不良,身体浮肿,其食疗补救措施是()
单项式2x2y,﹣5x2y,﹣x2y的和是____