用幽默的方式讲解一下---学科网 www.zxxk.com 让教与学更高效 C. [Diagram of a circuit: Power source connected in series to a switch, then to a lamp (circle with X), and then to a meter (circle with M). The meter is connected in parallel across the lamp.] D. [Diagram of a circuit: Power source connected in series to a switch, then to a meter (circle with M), and then to a lamp (circle with X). The lamp and meter are connected in series.] 二、填空题: 本大题共7小题, 每空1分, 共21分。(特殊题型: 每小题均3个空) 8. 如题图, 将一根直导线放在静止小磁针的正上方, 并与小磁针平行. 使导线与电池接触, 观察到小磁针发生偏转. 说明通电导线周围存在________, 还说明力能改变物体的________. 要想改变小磁针偏转方向, 可以改变导线中的________. [Diagram: A straight wire is shown above a magnetic needle. The needle has South (S) and North (N) poles labeled. The wire is shown connected to a battery. An arrow labeled I indicates current direction from the positive terminal of the battery, through the wire, and back to the negative terminal. An annotation "触接" is present near the connection points.] 9. 原子是由原子核和________构成的, 原子核带________电, 如题图是铀-235原子核模型示意图, 利用中子轰击该原子核能诱发________(选填“核裂变”或“核聚变”). [Diagram: A cluster of spheres, some red and some grey, are arranged in a roughly spherical shape. This is labeled as a model of a U-235 atomic nucleus.] 10. 佩香囊、吃粽子、赛龙舟是端午节的传统习俗. 我们闻到香囊的清香味, 说明分子在不停地做________运动; 煮粽子是通过________的方式增加了粽子的内能; 在加速滑行时, 龙舟的惯性将________(选填“变大”或“变小”或“不变”). 11. 小华用滑轮匀速提升重为10牛的物体, 如图(a)、(b) 所示, 图________中的滑轮可以看作省力杠杆; 图(a) 中, 若不计摩擦和滑轮重力, 力F1的大小为________牛; 物体上升过程中, 其重力势能________(选填“增大”或“不变”或“减小”). [Diagram: The image shows text referring to figures (a) and (b). Only part of the text and the question number are fully visible. Figure (a) is implied to show a pulley system used to lift an object.]