池塘施肥最好在阴天下午或傍晚进行（）
参考答案：错
One Sunday several former classmates gathered at Tom’s for lunch, ______ their high schoolreunion the year before.
A．talking about
B．having talked about
C．to talk about
D．talked about
在△ABC中，∠ACB=90°，AC=3，BC=4，CD⊥AB于D，以点C为圆心，2.5长为半径画圆，则下列说法正确的是( )
A．点A在⊙C上
B．点A在⊙C内
C．点D在⊙C上
D．点D在⊙C内
