操作方法
单选题 1D2C3D4C5C6C7C8A9B10A 11C12A13D14B15C16C17D18D19C20C 21A22A23D24B25A26C27C28B29C30B 31D32A33A34D35D36A37D38B39D40D 41D42D43A44A45B46C47D48C49C50D
判断题 1√2√3√4×5√6√7√8×9√10√ 11√12×13×14√15×16√17×18×19√20√ 21√22√23×24√25√26×27√28×29×30√ 31√32√33×34√35×36√37√38×39×40√ 41×42√43√44√45√46×47√48×49×50√