是润滑油最主要的物理性能,也是选择润滑油的主要依据。()
A、比重
B、黏度
C、湿度
D、pH值
参考答案:B
心理健康教育的内容主要分三个方面,即__________,生活辅导和择业指导。
He ___ me he was going abroad for further study, but he didn't ___ when he was leaving.
A.said… tell
B.told… say
C.told… speak
D.spoke… talk