2. 外语
  3. A、enabled the car to control its energy flow B、enabled the grip operators to monitor the car’s energy flow C、were provided by PJ

A、enabled the car to control its energy flow B、enabled the grip operators to monitor the car’s energy flow C、were provided by PJ

admin2021-09-17  71
问题
选项 A、enabled the car to control its energy flow
B、enabled the grip operators to monitor the car’s energy flow
C、were provided by PJM Interconnection for Kempton’s team
D、were custom-designed for Kempton’s team
答案A
解析 该段第2句开头的主语They指的是上一句提到的Kempton’s team，该句提到了他们使用了商业软件和硬件，结合上一句的custom-built和本句的这些软件和硬件的功能可以推断Kempton’s team将这些软件和硬件安装到电动车里，以使电动车能控制电池电力的流动方向，以达到为电网供电的目的。因此选A。
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大学英语六级

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