题目内容

为保证液压油在生产、储存、运输和使用等环节的安全，应选择燃点和闪点稍高一些的液压油。

A. 对
B. 错

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牛顿液体内摩擦定律只适用于牛顿液体。

A. 对
B. 错

Now I'd like to share some ideas with you about taking exercise and staying_________.

Let's start from the importance of_________.

As we can see, nowadays many people live a______ life.