A current focus is on the utilization of these technologies for environmentally

游客2025-01-18 50

问题 A current focus is on the utilization of these technologies for environmentally benign gas and oil well operations.

选项 A、harmless
B、mild
C、renewable
D、compressed

答案 A

解析词义辨析。注意副词和形容词的搭配。根据对环境有重要意义的，排除B、D选项。如果替换部分前没有副词，C选项也可以讲得通。

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