【单选题】以下程序片段,下列哪个选项插人到第2行将引起编译错误? ( ) package mypackage; //第二行 class MyClass{ //do something }
A.
public class MainClass{ }
【单选题】The evaporating pressure in R22 vapor compression refrigeration plant should be _____ atmospheric.
【单选题】There is considerable pressure on teenagers to ______.
【简答题】pressure [ˈpreʃə(r)]