下列指标中，衡量宏观税收的指标是( )。
A．企业税收负担率
B．国民生产总值负担率
C．直接税负担率
D．间接税负担率
参考答案：B
He found that his house had been ______ and some important files were lost.
A．broken into
B．taken out
C．made into
D．run out
XJ4316型双踪示波器的状态有（）、（）、（）。
