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问题 解答题
在横线上填上“＞”、“＜”或“=”
4987米______5千米80毫米______8厘米
3小时______150分3010千克______3吨
5分米______49厘米7000克______7吨
60秒______1小时2分______120秒．
答案

4987米＜5千米80毫米=8厘米
3小时＞150分3010千克＞3吨
5分米＞49厘米7000克＜7吨
60秒＜1小时2分=120秒
故答案为：＜，=，＞，＞，＞，＜，＜，=．

问答题 简答题

目前，许多已经在岗的从事技术工种的人员没有取得相应的职业资格证书，是不是也会被处罚？
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问答题

People have cooked over open fires and dirty stoves for all of human history, but the simple fact is they are slowly killing millions of people and polluting the environment. Engineers and development professionals have worked on this problem for decades. My own involvement stretches back many years, and I’m well aware that well-meaning efforts have been launched, but none have managed to match the scope of the challenge.
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