火力发电厂中发电机是将（）的设备。
A.热能变为电能
B.化学能变成热能
C.机械能变为电能
D.热能变为机械能
参考答案：C
Jimmy and Timmy are both 50 kg, that is to say, Jimmy is ______ Timmy. [ ]
A. so heavy as
B. as heavy as
C. so heavier as
D. as heavier as
入口活套内CPC对中精度为（）。
A、+/-5mm
B、+/-2mm
C、+/-1mm
D、+/-3mm
