Which fragment is an example of inappropriate use of assertions? () [" assert (!(map.contains(x))); map.add(x);"," if (x > 0){}else { assert (x==0); }"," public void aMethod(int x) { assert (x > 0); }"," assert (invariantCondition()); return retval;"," switch (x) { case 1: break; case 2: creak; default: assert (x == 0);"]
收集证据的渠道主要有()。 ["现场勘验","搜查","审讯被告人","询问证人"]
十九世纪法国歌剧有哪些种类() ["大歌剧","谐歌剧","乐剧","喜歌剧","抒情歌剧"]
public class X { public X aMethod() { return this;} } public class Y extends X { } Which two methods can be added to the definition of class Y?() [" public void aMethod() {}"," private void aMethod() {}"," public void aMethod(String s) {}"," private Y aMethod() { return null; }"," public X aMethod() { return new Y(); }"]
下列何人是中國歷史上第一個平民出身的皇帝?() ["秦始皇","漢高祖","唐太宗","明太祖。"]
试分析过程模式的特点及对幼儿园课程编制的影响。