【单选题】下列有关银的性质论述中,正确的是( )。
【单选题】某轮吃水14m,在某开敞锚地锚泊,若该处最大波高为3m,则应选择的锚地应能保证在低潮时具有:
【单选题】Which of the following statements is correct? (1) On a section of the bar, if the axial force N is positive(tension), the normal stress σ at each point is also positive(all are tensile stress). (2) On...
【简答题】stress n.____vt. ____
【简答题】Estamos estudiando, pues no _____ (molestarnos, tú).