设子弹的质量为0.01kg，枪口直径为0.5cm，试求子弹射出枪口时横向速度的不确定量

-- Tom, will you go to see the film Lost In Thailand this evening?

-- No, I won't. I _______ it already.

                                                                                                      登岳阳楼
                                                                                          昔闻洞庭水，今上岳阳楼。
                                                                                          吴楚东南坼，乾坤日夜浮。
                                                                                          亲朋无一字，老病有孤舟。
                                                                                          戎马关山北，凭轩涕泗流。

小李学习了病毒、细菌和真菌的有关知识后，列表比较了它们的区别，完全正确的是（　　）