1. interface Animal { 2. void eat(); 3. } 4. 5. // insert code here 6. 7. public class HouseCat implements Feline { 8. public void eat() { } 9. } 和以下三个接口声明: interface Feline extends Animal { } interface Feline extends Animal { void eat(); } interface Feline extends Animal { void eat() { } } 分别插入到第 5 行,有多少行可以编译?() ["0","1","2","3"]
适用于四肢大动脉出血止血方法是() ["指压法","加压包扎法","填塞止血法","止血带止血法"]
在台秤的移动过程中,应将()拨下,卡住标尺,不使其损坏。 ["休止器","视准器","游铊","秤铊"]
沥青混合料按矿料级配组成及空隙率大小可分为()。 ["密级配","开级配","连续级配","间断级配","半开级配"]
韩国媒体发布民意调查,有六成受访者认为,韩国仓促宣布部署“萨德”是屈服于()的压力,要求“重新探讨部署方案”。 ["德国","俄罗斯","中国","美国"]
设备更新原则