【简答题】( )风景区是世界上规模最大、风景最美的岩溶山水游览区。
【单选题】()风景区是世界上规模最大、风景最美的岩溶山水游览区。
【判断题】漓江风景区是世界上规模最大、风景最美的岩溶山水游览区;
【单选题】You ______ your own sandwiches. I have enough for two.
C.
shouldn' t have brought
【单选题】The material and cross-section of the two beams are the same (as shown in the figure), then the ratio of the maximum deflection of the two beams ( y a : y b ) is .