风湿小体形成多发生于病理过程的（）
A.变性渗出期
B.增生期
C.硬化期
D.变性渗出期和硬化期
E.恢复期
参考答案：B
____, the amount left in the bank is hardly worth mentioning.
A．Having paid my taxes
B．Paying my taxes
C．My taxes having been paid
D．My taxes had been paid
通过电场、磁场之间不断的能量转换，电磁波得以从（）向外传播，电场和磁场的方向与传播方向保持垂直。
A、交变磁场
B、天线
C、半波振子
D、双极振子
