可以用来做微波中继站的是( )
A.月球 B.地球
C.地球的同步通信卫星D.任何星球都行
答案:C
Up to now, Hope Project has helped thousands of students who would _____ have dropped out of school. [ ]
A. therefore
B. anyway
C. otherwise
D. nevertheless
如果有一个类MyFrame是Frame的子类,能够被不同包中的类所使用,请写出该类的声明头:【 】。