页岩气是一种以游离或吸附状态埋藏于致密的页岩层或泥岩层中的非常规天然气，下图为页岩气埋藏构造示意图，据此完成下列各题。
对页岩气的大规模开采使用可以（）
A.改变地表形态，并导致地面沉降
B.减少对石油的依赖，低碳效益明显
C.导致地下水污染，地下水循环更活跃
D.改善大气环境质量，降低二氧化碳浓度
参考答案：B
解析：
页岩气是主体上以吸附或游离状态存在于泥岩、高碳泥岩、页岩及粉砂质岩类夹层中的天然气，其大规模开采使用不会改变地表形态，不会导致地面沉降，不会导致地下水污染，A、C项错误；页岩气的大量使用，同样不会降低二氧化碳的浓度，D项错误；页岩气的大量使用，可以改变能源消费结构，降低对石油的依赖，相比较石油的使用来说，排放的二氧化碳量要少，所以B项正确。
考点：地质构造；能源。
How can you think in English? I think the best way is to practise as what a football player 26_____ every day. During the __27__ the football player will pass the ball to his teammates over and over again. So he won’t have to __28___ passing the ball in the game; he will just do it. You can train yourself ___29 ___in English this way. The first step is to think of the words that you use daily, simple everyday words __30___ book or shoe or tree. For example, whenever you see a “book”, you should think of it in English instead of in your mother language. After you __31__ to think of several words in English, then move on to the next step-thinking in sentences. Listening and repeating is a very useful way to learn __32___ . Listen first and don’t care too much about ___33 ___you fully understand what you’re hearing. Try to repeat what you hear. The more you listen, the ___34__ you learn. After you reach a higher level, ___35___ having conversations with yourself in English. This will lead you to think in English.
|