梅毒粘膜斑发生在()梅毒树胶肿发生在()桑葚牙发生在()
A. 三期梅毒
B. 先天梅毒
C. 后天梅毒
D. 一期梅毒
E. 二期梅毒
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正常胎儿的血循环中下列哪一部位的血氧含量最高()
A. 脐动脉
B. 脐静脉
C. 左心房
D. 右心房
E. 主动脉
油浆系统结焦的原因是()
A. 油浆性质差
B. 塔底温度低
C. 塔底液位低
D. 压油浆流速高
11. static classA { 12. void process() throws Exception { throw new Exception(); } 13. } 14. static class B extends A { 15. void process() { System.out.println(”B “); } 16. } 17. public static void main(String[] args) { 18.A a=new B(); 19. a.process(); 20.} What is the result?()
A. B
B. The code runs with no output.
C. An exception is thrown at runtime.
D. Compilation fails because of an error in line 15.
E. Compilation fails because of an error in line 18.
F. Compilation fails because of an error in line 19.