防毒面罩使用后,应做些什么?
参考答案:
使用后,面罩可用肥皂水洗涤晾干,再用75%酒精棉球揩擦消毒。滤毒罐则应将上盖和底部橡皮塞拧紧堵住,保持密封,防止内部药剂受潮失效。
Tom put his heart into the wildlife research, and finally, his efforts __________ him great success and
fame.[ ]
A. saved
B. earned
C. made
D. offered
常用的辅助安全用具有()等。
A、绝缘手套
B、绝缘靴
C、绝缘垫
D、绝缘站台