题目

观察木屋模型，发现木屋是依靠横梁和柱子支撑的。下列关于 “横梁”和“柱子”的说法，正确的是()。 A . A是柱子，B是横梁 B . 只有房屋建筑中存在横梁和柱子 C . 横梁比柱子更容易弯曲和断裂，所以研究横梁的抗弯曲能力很重要 答案：CThe toddler who miraculously _____ a fall from her 10th-floor home in Hangzhou, east China,_____ recovering quickly.  [     ]A. is survived, is B. are survived, areC. survived, is D. being survived, are