单项选择题

血红蛋白与肌红蛋白都能与氧结合所以都能运输氧。
A、正确
B、错误

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多项选择题

What should be included in a qualified road show PPT ( ).

A．Who are you
B．What do you want
C．What have you done
D．What have you got

不定项选择

新冠疫苗接种时若患有轻中度急性疾病，无论是否有发热症状，应症状消退后再接种。‌

A．错误
B．正确