单项选择题
A.21~22℃ B.30~35℃ C.30~32℃ D.32~34℃
A.1 B.2 C.3 D.4
A.70%~80% B.60%~70% C.50%~60% D.40%~50%
A.2 B.3-4 C.4-5 D.1
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