使血红蛋白易与氧结合的情况是()
A、C、O中毒
B、C、O2分压增高
C、O2分压增高
D、PH增高
参考答案:C
Although she doesn’t like to live in the country, _______ , she goes there for a picnic.
A.once in a while
B.for a while
C.at the moment
D.from now on
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