题目

家用A、B两只白炽灯泡，A灯的灯丝比B灯的粗些、短些，则它们正常工作时 (    )A．A灯的电功率较大                      B．B灯的电功率较大C．两灯的电功率一样大                    D．条件不足，无法判断  答案：A解析:略 You should ________ a pen pal to practice writing. [　　] A．lookB．look for C．find outD．find