Java语言用( )进行解释执行。
A．双字节码
B．脚本编译器
C．机器码
D．字节码
参考答案：D
一个多边形每个外角都等于30°，这个多边形是[ ]
A． 六边形
B． 正八边形
C． 正十边形
D． 正十二边形
Poor Tim is too nervous to start his speech. Someone should remind him________.
A．how to talk
B．whether to speak
C．what to say
D．when to tell
