Java and C++,which is better and useful?

Java and C++,which is better and useful? 4.Which of the following are primitive Java types?I.int II.Integer III.Double (a) II and III only(b) I and II only(c) I only(d) I,II and III only Valid comments in Java include which of the followingValid comments in Java include which of the following?I /* Comment 1 */ II // Comment 2 III /*** Comment 3*/ (a) I,II,and III(b) II only(c) I and II only(d) I and III only I'm watching the boy and the dog ___are playing on the playgroundA that B who C which Dwho and which I will never forget the people and the things ___ I saw during my stay in Europe.A.that B.which C.in which D.that wasWhy not 题干He put forward a theory,_______ of great importance to the progress of science and technology.选择一项：a.I think which is b.which I think is c.I think it is d.which is I think Java/C++：(1 （ ）I know ,Tom is honest and kind to othersA.Which B.As C.What D.It I like to live in a room ( )is big and bright A that B /where C how D .in which I like the teacher ___ classes are very interesting and creative.A.which B.who C,what D.whose （ ）I missed most was my beautiful hometown and my parents.A.That B.What C.没有 D.Which I want to know the people and the things ____you talked about.A.that B.which C.who D.whose i like the teacher____classes ar very interesting and creative.A which B who C what D whose 2.That's all ______ I have seen and heard.A.which B.that C.where D.what that's___ i've seen and hearda. what b.all which c.all what d. that all I'll never forget the singer and the songs___attract me so much. A.who B.that C.which D.whose I have been living in Beijing for almost a year and I'm still surprised at the speed ____ it is developing.A.at what B.at which C.with what D.with which Which one?Why? In Java,the method HttpRequest.getParameter returns an object of which of the following classes?(In Java,the method HttpRequest.getParameter returns an object of which of the following classes?(a) Parameter(b) String(c) HttpRequest(d) PrintWriter说