题目

阅读下列短文，从每题所给的A、B、C、D四个选项中选出最佳选项。Themoment that Jiang Mengnan received the Touching China Person of the Year Award for2021, she said she most wanted to express her gratitude to her parents. Born in1992 in Yizhang county, Hunan Province, Jiang's world has been silent since shewas 6 months old, when ototoxic (耳毒性的) drugs shewas given irreparably damaged her hearing. So, Jiang's parents, both middle schoolteachers, taught her to learn vocalization and lip reading. Jiangput her hands on the throats of her parents when they talked and f用玻璃管向澄清的石灰水中吹气，将出现的变化是（ ）A．变蓝B．变浑浊C．无变化D．变红