题目

如图，光滑固定斜面的倾角均为θ，用细绳悬挂质量相同的小球，球都静止于斜面上，其中球对斜面的压力最小的是（） A . B . C . D . 答案：C造句。（看谁的句子生动、具体） ……有趣……                                                                                                                    ……热情……                                                                                                                      ……惊讶……                                                                                                                      ……越……越……                                                                                                                      ……一边……一边……                                                                                                                      ……又……又……