在自控专业中，下列哪个符号表示流量（）。
A、L
B、F
C、T
D、P
参考答案：B
----Any news about Bill Clinton?
----He left power three years ago and has a little now and a little then been ______.
A．heard of since
B．heard since
C．heard before
D．heard of before
某企业转让房地产，收入总额为1000万元，扣除项目金额为400万元，则应缴纳土地增值税( )万元。
A．180
B．200
C．240
D．300
