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【单选题】
真理的客观性决定了真理的A.
正确性
B.
科学性
C.
一元性
D.
客观性
拍照语音搜题，微信中搜索"皮皮学"使用
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【单选题】下列关于粘性系数的描述正确的是( )。
A.
温度变化，气体粘性系数随之变化，而液体粘性系数则保持不变
B.
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C.
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A.
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B.
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C.
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D.
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