判断题

水循环回路中，汽水混合物的密度小于水的密度。

答案：正确

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答案： (1) 左、右手 (...

多项选择题

Which of the following statements are TRUE? (多选题)
A、Protagoras said that “Man is the measure of all things”.
B、Heraclitus said that “You cannot step in the same river twice”.
C、Pythagoras and Thales were not pre-Socratic philosophers.