我国是温室气体排放大国，发展“低碳经济”既是长久的大计，也是当前的大事。为此企业应该
①扩大投资规模，提高商品质量
②提高节能环保意识，承担相应的社会责任
③降低生产成本，实现盈利的最大化
④加强科技开发与应用，成为技术创新的主体
| A．①③ | B．①④ | C．②③ | D．②④ |
相关试题
—I need some fresh air, so I’m going out for a walk.
—_______.
| A．With pleasure | B．Have fun | C．You’d better not | D．It’s none of my  business |
She was once trained for better English pronunciation and ________ she ________ obvious pronunciation mistakes.
| A．then; rarely has made | B．ever since; has rarely made |
| C．then; has rarely made | D．ever since; rarely has made |
No government so far has been 
able tothe number of jobs available with the number of people out of work.
| A．provide | B．weigh | C．multiply | D．balance |
Every possible means ________, but the teacher as well as the students ________ found a solution to the problem yet.
| A．has been tried; hasn’t | B．has tried; haven’t |
| C．have tried; haven’t | D．have been tried; hasn’t |
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