Carol the science teacher in Tennessee said the kids should not be exposed to the outside world.()

With the development in science and technology ？

An extensive foundation in the basic sciences should be required of all science students,

At lunch time, the woman wasA．in the cafeteriaB．in the libraryC．in the political science c

The incoherence in Britains science education policy reveals thatA．science graduates are o

The teacher doesn’t permit ________ in class.A) s

类Teacher和Student都是类Person的子类。 Person P; Teacher t; Student s; P t和s都是非空值 if(t ins