声明并创建一个学生类Student的对象s,下列语法格式正确的是: A: Student s = Student(); B: Student s; C: Student s = new Student(); D: Student s = new ();

Many a student () (ask) the same questions by the teacher in yesterday’s class.

l can see  three __________ ( girl student )and two __________ ( woman teacher )standing there.

下列程序的运行结果是（）。class student{function _construct(){echo "I am a student .<br>";}function teacher(){echo "I am a teacher";}}$per=new student(); A: I am a studentI am a teacher B: I am a student C: I am a teacher D: 无任何输出

______ should be strict with _______ . A: Teacher; a student B: The teachers; students C: Teachers; students D: Teachers; a student