耳穴定位中，耳甲腔正中凹陷处，即耳甲15区的耳穴是：
A．肝
B．脾
C．心
D．肺
E．盆腔
参考答案：C
Peter was so excited _____ he received an invitation from his friend to visit Chongqing.[ ]
A. where
B. that
C. why
D. when
知春亭的面积是（）平方米
A、10.0
B、49.0
C、50.0
D、79.0
