【判断题】弯曲梁横截面上的正应力与该点到中性轴的距离成正比。
【简答题】A.They are strangers. B.They are colleagues. C.They are friends. D.They are neighbors.
【单选题】A) They are twins. B) They are classmates. C) They are friends. D) They are colleagues.
【单选题】下列哪类集装箱在装卸时一般使用喷管和吸管操作( )。
【简答题】A.They are inspiring. B.They are humorous. C.They are dull. D.They are wonderful.
【简答题】A.They are great soldiers. B.They are civilized. C.They are intelt because they are good at fighting. D.They are right if they win the war.
【简答题】A.They are tour guides. B.They are salespersons. C.They are tourists. D.They are engineers.