质点应满足宏观上无穷大微观上无穷小。 某点的真空度为65000Pa,当地大气压为0.1MPa,该点的绝对压强为()。 A:错 B:对 答案: 错 A:35000Pa B:165000Pa C:6500Pa D:65000Pa 答案: 3 点我阅读全文
A:undertaken B:undergone C:underpaid D:underdone 答案: undertaken “Of course I’m( ); 2-10, there’s no defense for that, pa 点我阅读全文
A:undertaken B:undergone C:underpaid D:underdone 答案: undertaken “Of course I’m( ); 2-10, there’s no defense for that, pa 点我阅读全文