第3题: [单项选择]下列关于Test类的定义中,正确的是 A. class Test implements Runnable { B. class Test implements Runnable { C. class Test implements Runnable { D. class Test implements Runnable { 参考答案:A
第22题: [单项选择]Structural stress on a ship can be reduced by(). A. lessening the effect of environmental forces B. even and symmetrical variable loading C. local concentration of heavy consumables D. increasing the metacentric height 参考答案:B