如图所示，E、F分别表示蓄电池两极，P、Q分别表示螺线管两端。当闭合开关时，发现小磁针N极偏向螺线管Q端。下列判断正确的是
A．F为蓄电池正极
B．螺线管P端为S极
C．流过电阻R的电流方向向下
D．管内磁场方向由Q指向P
AD
题目分析：根据小磁针N极偏向螺线管Q端判断Q端为电磁铁的S极，P端为N极，选项B错。根据右手螺旋定则，流过电阻R的电流方向向上，选项C错。根据外电路电流从正极流向负极，F为蓄电池正极，选项A对。螺线管外部磁场从N指向S，内部磁场从S指向N，所以管内磁场方向由Q指向P，选项D对。
| 任务型阅读。根据短文内容完成下列表格，并将完整单词写在答题卡对应题号的横线上。(每空一词) | ||||||
| Qian Xuesen was a rocket scientist. He was famous all over the world as the father of China’s space technology. He was born in 1911. On October 31, 2009, he passed away peacefully at the age of 98. When Qian Xuesen was three years old, his father got a job in the Ministry of Education in Beijing, so he and his family came to Beijing. Qian Xuesen graduated from Shanghai Jiao Tong University in 1934. In 1935, he went to the United States for further study. In 1950, he heard that the new China had been founded, he began to try his best to go back to his motherland. Although the American g  overnment tried to stop him from his journey, he succeeded in going back in 1955. Since 1958, Dr. Qian had devoted all his life to China's aerospace science and technology (航天技术) and made great achievements. He set up China's first missile-and-rocket-research institute (导弹、火箭研究机构), which later helped start China’s space program. He retired in 1991,the year before China's manned space program (载人航天计划) was started. His research formed the basis (基础) of the Long March CZ-2F rocket that carried astronaut Yang Liwei into orbit in 2003. | ||||||
| Qian Xuesen—the 1._____ of China’s space technology | ||||||
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