信息传送者和信息接收者的世界观、价值观、人生观的差别过大会形成（） ["认知性信息障碍","接收者的情绪障碍","情感性信息障碍","距离障碍>"]
1. public class X （ 2. public object m （） { 3. object o = new float （3.14F）； 4. object [] oa = new object [1]； 5. oa[0]= o； 6. o = null； 7. return oa[0]； 8. } 9. } When is the float object created in line 3， eligible for garbage collection？（） [" Just after line 5"," Just after line 6"," Just after line 7 （that is， as the method returns）"," Never in this method."]
结构构件在荷载作用下不会发生破坏，这就要求构件具有足够的（）。 ["刚度","稳定","强度","平衡"]
犯罪人首先手写反动标语，然后复印成若干分广为散发，其中手写的原件及复印件标语属于（）。 ["原始证据","传来证据","物证","书证"]
正常直方图，其形状特征有（）。 ["两边低","中间低","中间高","成对称","两边高"]
3. string foo = “ABCDE”；
4. foo.substring（3）；
5. foo.concat（“XYZ”）；
6.
Type the value of foo at line 6.（）
