防伤亡“三十”字令的内容是:()()()()()(); 。
参考答案:人命重泰山、时刻把住关、鸣笛勤呼唤、瞭望不见断、撂闸不犹豫、停车要果断
In order to keep healthy, you should eat _______ meat, _______ vegetables and take enough exercise.
A.less, less
B. less, more
C. fewer, more
PE线不得穿过漏电保护器,但PEN线可以穿过漏电保护器。