请将这句话For many years after the introduction of automobiles, three kinds of power sources were in common use: steam engines, gasoline or petrol engines, and electric motors.翻译成中文。
【单选题】Most of us think we know the kind of kid who becomes a killer, and most of the time we're right. Boys (1)_____ about 85% of all youth homicides, and in those cases about 90% (2)_____ a pattern in whic...
【单选题】Most of us think we know the kind of kid who becomes a killer, and most of the time we're right. Boys 【C1】______ about 85% of all youth murderers, and in those cases about 90% fall within a pattern 【C...